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Umpire Training Now!
by posted 07/20/2018


Thunder Families,


All of us are guilty of being a critic or disagreeing with a call by a plate or field umpire, right? Now here is your chance to make a difference. You can recommend someone, you can forward this to, or you can sign up today to be part of the solution. Anyone fourteen years or older is eligible, however, driving age is preferred.


Being a quality umpire is a learned process and can be a confidence builder when performed properly. However, it can go south really quick if players and parents are not treated with the same respect umpires expect when making subjective calls. See below the note from Nick Prosser.


My name is Nick Prosser, and I am one of the assigners for Mile High Umpires LLC.  We are an organization that runs 21+ tournaments a year, spring and summer league games for RMJBL, and fall baseball for a bunch of the areas within the Denver Metro area.  We are excited for our upcoming umpire class and hope that you will be in attendance.  Please confirm whether or not you will be there at the start of this class.  This way, we have a head count before the class begins.  Payment will take place on the first class on August 1st.  Cash or paypal will be accepted.  If you choose to go the paypal route, please let me know and I will get you the information you need for payment.  This can all be taken care of in person at class though.  Now, on to the information you'll need to succeed in this class.


Attendance is required, but we are flexible.  We understand that people have lives outside of this.  If you need to miss a class, please inform us ahead of time so that we can prepare materials for you to get caught up.  We are planning on running this class as fast as we can to get everyone on the field and making money.  As of now, our dates consist of Wednesday evenings beginning on August 1st and finishing up on September 8th.  These Wednesday sessions will be purely rules sessions and plate work.  We will also be meeting on Saturday mornings during this same time period to work on positioning and mechanics.  A full schedule is listed below.  


The two guys training this class are both former professional umpires that worked games in minor league baseball.  They are two of the best umpires from the state of Colorado and are great instructors as well. There will be a multiple choice exam at the end of our rules sessions.  This test usually spans from 50-100 questions.  We want to set you up to succeed in this business.  We are resources that you will have at your disposal throughout your umpiring career.  Whether this is a summer job for you, part time, or if you wish to go to pro school, we can push you in the right direction.  We will be giving away free gear and other items that will be used on the field during this class.  We like to have some competition and a little bit of fun to break up the monotony of classes.  Please on Wednesdays come prepared with a pen or pencil.  Rule books will be provided.  I have a full set of plate equipment to give away, as well as some plate brushes, indicators and things like that.  We will also discuss the assigning process in depth as well as how you get paid for games.  Starting pay is $40 per game, games are an hour and 45 minutes long, so over $20 an hour for a starting job and you get to watch baseball while doing it.  Once the class is completed, you will only be required to show up to a veterans meeting in the winter each season.   


Classes Cost $120 per student.  


NJJBA Indoor Facility - 6385 W 52nd Ave #4

                                         Arvada, CO 80002


Class Schedule


Wednesday August 1st           6PM-9PM              Introduction, Payment, First Rules Session                         NJJBA Indoor Facility

Saturday August 4th               8AM-11AM            Initial mechanics, Positioning, Plate Stance                         TBA

Wednesday August 8th           6PM-9PM              Rules Session                                                                      NJJBA Indoor Facility

Saturday August 11th             8AM-11AM            Rehash First Mechanics Session, New Mechanics               TBA      

Wednesday August 15th         6PM-9PM               Rules Session                                                                      NJJBA Indoor Facility

Saturday August 18th             8AM-11AM            Rehash previous mechanics, Combine plate and bases        TBA

Wednesday August 22nd        6PM-9PM               Rules Session                                                                      NJJBA Indoor Facility

Saturday August 25th              8AM-11AM           Field Work                                                                             TBA

Wednesday August 29th         6PM-9PM               Rules Session                                                                         NJJBA Indoor Facility

Saturday September 1st           8AM-11AM           Field Work (Possible Live games)                                         TBA       

Wednesday September 5th      6PM-9PM               Final Rules Session, Final Exam                                           NJJBA Indoor Facility

Saturday September 8th          8AM-11AM           Final Field work, Evaluation                                                 TBA



Please let me know if I can be of any more assistance regarding our training classes.



Nick Prosser



Nick Painz – Instructor



Cameron Westover – Instructor


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Thunder Academy Information Exchange
by posted 07/02/2018

Thunder T

Thunder Families,

Reminder for tomorrow’s meeting 6-7pm.


  • Why Thunder Academy?

  • Review Academy Road map from 9-18 years of age

  • Thunder Academy Alumni updates

  • Come meet Kent McCurdy from FAST-Strength and Conditioning for 2019

  • Partial list of Head coaches for 2019 Academy teams

    View the you tube video link (2014 narrated by John Jenson) below for a description of the difference between Thunder Baseball League and Thunder Academy.  Thunder Academy teams provide the highest level of competition among all Thunder Baseball League teams.


Thunder Baseball Academy will be having an open house on Tuesday, July 3, 2018 at Thunder Academy from 6:00-7:00pm. This will give parents a chance to ask questions to Darron Cox and Tom Dedin regarding the 2019 program. Come learn about the depth of teams and years of experience in developing youth baseball players. This is an opportunity to learn about culture and mentoring programs the Academy teams provide. Many kids from this program have gone on to play in Division I, II, III and Junior College.

Thunder Baseball Academy is a developmentally-based association established for the purpose of changing lives through quality instruction in a positive environment. We believe most kids want to be successful, but don’t understand how to achieve that success.

Our coaches—who are not win-at-all-costs people—believe education, in baseball and in life, is what bridges the gap between kids’ desire for success and having the skills to be successful. That education happens in a positive environment, where mistakes in practice are encouraged and each athlete is given the freedom to be successful.

Thunder Baseball Academy owner, Darron Cox, and his coaching staff have been around some of the greatest minds in the baseball world. They bring wisdom from experience in the Major Leagues, Minor Leagues, college, high school and Little League. Coach Cox has had the privilege of coaching Major League Colorado Rockies’ players Matt Holiday, Brad Hawpe, Ryan Spilborghs, Chris Iannetta and Ubaldo Jimenez, to name a few.

Whether you’re preparing for high school baseball, training for your college team or working out in the offseason, Thunder Academy’s world-class coaches, baseball training philosophy and training facilities will provide the tools you need for success.

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Fall Ball 2018
by posted 06/30/2018

Fall Ball

Fall Ball 2018:

July 1, 2018--Fall Ball Registration Opens. Accepting COACHES applications now!

Click on the REGISTER NOW button on the home page and choose the right program.


August 17th Friday--Fall Ball Registration closes.

August 25th -- Fall Ball Teams set and coaches notified by September 1, 2018.

No games on Labor Day Weekend - September 3, 2018.

September 10th --Sunday--First Game (see Team Pages on for schedule after September 3, 2018) shirts distributed at BIP prior to your first game.

October 21, end of season tournament. October 28, make up end of season (if necessary)


For 2018, we will have the following age divisions: Machine Pitch, 7/8, 9/10, 11/12, and 13/14 age groupings.  Players will play in the age group for the 2019 season.

Fall Ball games are played every Sunday, with very few (if any) practices. Practice is typically 1 hour before the game. Some teams can choose to hold practice once a week, however, the expectation is that players are playing other sports like soccer, football, etc. to be well rounded players.

The 7/8 year old’s play one game every Sunday, 6 to 8 games total. Shirts are included (red and white) in $125.00 registration fees and "End of Season" tournament included for all teams.

The 9/10, 11/12, 13/14 year old’s play double headers every Sunday, 12-16 games per season.  Shirts are included (red and white) in $185.00 registration fees and "End of Season" tournament included for all teams. Coaches can request afternoon only games for those families that want to attend church on Sunday mornings. Our scheduler will do her best to accommodate.

Are you interested in machine pitch?

Machine pitch is a great way to develop young players (6-8 year old’s). Typically the kids see more consistent pitching and are taught that they have to hit (no walks). Shirts are included (red and white) in $125.00 registration fees and "End of Season" tournament included for all teams.

Make sure you register under the Machine Pitch specific registration.

This creates a great environment to develop skills in the field as well, as you see many more fielding opportunities because kids are hitting and not walking. Machine pitch is not for very beginners, players should be able to throw, catch, and play baseball for the length of a game (1.5 hours).

If you are interested in machine pitch, email Candice Smith at:   


https://2018 Fall Ball Summary 6.30.18.pdf


https://2018 Consolidated - Fall Baseball League Rules Mgmt.pdf


https://2018 Machine Pitch Rules Fall Ball.pdf



1. What are the dates for the Fall Baseball Season? The Fall Baseball season starts with practices are optional during the week of August 27th. Games will start Sunday, September 9th and will run through Sunday, October 14th. No games on Labor Day weekend. The season will end with a 1-day tournament on Sunday, October 21st. In case of inclement weather that day, we will play the tournament on the following Sunday, October 28th.

2. What days will Fall Baseball games be played? Games are only played on Sundays ONLY. Players in the 7/8 age group and Machine Pitch will play single games and players age 9/10-11/12-13/14 will play doubleheaders (2 games on the same day).

3. What age groups can play baseball in the Fall Baseball Season? We will have 7/8, 9/10, 11/12, and 13/14 age groups this year. Players will play at the age that they will play in the following Spring/Summer. For example, a player who is now 10 years old and will play next Spring at age 11, will play on a 11/12 team this Fall. The idea is to give the players a taste of what they will encounter next Spring. Machine pitch will be offered for 7/8 year old’s, in addition to kid pitch division.

4. What if I want to bring in a full or partial team? If your team wants you, then so do we! Follow the steps below:

a) Register the coach's son and pay the fee in full. b) Make sure that each of the players puts the coach's name down in the "coach request" box when they register online. c) Send a list of the player’s names to Candice Smith  Secretary and Shawn Williamson , fall baseball Director tp ensure that your entire team will be kept together.

5. Can I request a coach or play with a friend? Yes, we will do our best to accomodate all requests, however, no guarantees. Just list the coaches or players first/last name upon registration.

6. What is the cost per player for the Fall Baseball program? Registration fees are $125/player for ages 7-8 and $185/player for ages 9-14 kid pitch program. Machine pitch will be available for 8 and under and registration fees are $125 per player and register with your home area. Contact your area Fall Ball coordinator for more details.

7. Where will the Fall Baseball games be played and what time do they start? All games are played at Broomfield Community Park, Broomfield Industrial Park, Brighton Ron Cox, BSC, BYBA, Northern Lights Fields and Arvada Area fields. Game schedules and additional information will be made available on the "Fall Baseball" web pages. Games are typically played Sunday’s between 8 am and 6 pm.


Shawn Williamson

Executive Director


Thunder Baseball League, Inc.

PO Box 31

Broomfield, CO 80038


Thunder Academy

6900 W. 117th Ave, Broomfield, CO 80020

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Thunder Academy and Thunder Baseball League Tryouts
by posted 06/24/2018

Thunder Academy Information

Thunder Families,


With the Spring 2018 season coming to an end, we are preparing for the 2019 tryouts for both Thunder Baseball League and Thunder Academy Tournament Only teams. Registration will open in early July. Your player must be registered to attend tryouts.



Broomfield Industrial Park (BIP) Clapper, Lange and Rockies on Saturday July 28th

Players age is determined by their age on April 30, 2019.

9-10’s from 9AM-12PM* and 11-12’s from 1PM-3PM*.

*Players from Saturday may be called back on Sunday 

Sunday, July 29th for 13-14’s from 3PM-5PM.

Make-up tryouts all ages 6-8pm on 8/1 at Thunder Academy

(see attached flyer for details regarding Thunder Academy teams and fees).

https://THUNDER ACADEMY YOUTH TEAMS 2019 ver4.pdf

Coaches for all age groups will be posted in early July and prior to tryouts.

View the you tube video link (2014 narrated by John Jenson) below for a description of the difference between Thunder Baseball League and Thunder Academy.  Thunder Academy teams provide the highest level of competition among all Thunder Baseball League teams.



Thunder Baseball RMJBL League tryouts:

Saturday, August 11th  - Players will rotate stations of running, throwing and hitting.

Players age is determined by their age on April 30, 2019.

2:00 PM - 4:30 PM
AGE DIVISIONS FOR THIS TRY-OUT ARE: 12's, 13's, and 14's

Broomfield Industrial Park - Fields: Clapper, Lange, and Rockies

Check in begins at 1:15 PM

Sunday, August 12th  - Players will rotate stations of running, throwing and hitting.

2:00 PM - 4:30 PM
AGE DIVISIONS FOR THIS TRY-OUT ARE:  8's, 9's, 10's, and 11's 

Broomfield Industrial Park - Fields: Lange, Rockies

Check in begins at 1:15 PM


Wednesday, August 15th  - Thunder Academy 6:00-8:00PM. Make-up Tryouts (attend only if you missed one of the sessions above).

2019 Thunder League registration fees will be $375

2019 Full uniform packages are $135

Reply to this email with any questions. Thank you for choosing Thunder Baseball League.


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2018 TBL Annual Calendar
by posted 11/04/2017



Thunder Families,


The 2018 spring season will be here before you know it! Good luck to all those players getting extra work with individual private professional lessons and  players enrolled in the Progressive Hitting and Progressive Pitching programs that start November 6, 2017.


We are excited to present the attached “2018 TBL Annual Calendar” to help plan your season. Some dates and times are “subject to change”. Thunder Baseball League offers many different opportunities beyond league baseball games.


Exciting events like “Opening Day, Team Picture Day, Day at the Rockies, and Bats for a Cure Tournament” help build our Thunder Community. Talk to your team manager to ensure you don’t miss any important events.


We will continue Thunder Academy coach lead “age specific” training sessions during the season on Monday’s. Make sure your team does not miss out!


Make it a great day!


https://2018 TBL Annual Calendar v3.pdf


Thunder Baseball League

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