Meet the Team

Paolo Diaz- Club Director

Paolo became involved with Bison Lacrosse through his kids' interest in the sport. Though he didn't play lacrosse growing up, he fell in love with the game watching his kids play and following the game. He has coached for the Bison these last two seasons. Paolo brings a knowledge of program development and community partnerships to Bison Lacrosse.

Mindy Diaz- Club Director

Mindy has been a fan of lacrosse since her kids began playing 5 years ago. As a game day chauffer, cheerleader and snack mom for several years, she has added some lacrosse knowledge to her background. Mindy has been involved with Bison Lacrosse through volunteering and now hopes to take on a bigger role as one of the club directors. Bison Lacrosse can benefit from her background in education and business. 

Bryon Guyer- Coach

Bryon has been coaching youth sports in the Commerce City area for the last 10 years and lacrosse for the last 6 years. Raising 2 young athletes in the community has granted him the opportunity to see youth athletics from just about every angle. He grew up playing sports at the Commerce City Recreation himself, usually on a team his father coached, and later working for the city as an official. Teaching character development and accountability through youth athletics has become a family tradition for the Guyers, one that Bryon has been proud to carry on as a member of the Bison Lacrosse family! He also enjoys serving his community as director and coach for local CCYA Girls Softball. 

Brian Reffner- Coach

Brian Reffner is just a LAX dad. From Southern California originally, he came to Colorado after being stationed here in the Marines and met his lovely wife. They have 2 kids, Alanna, who evaded LAX, and Nolan, the reason he knows anything about the sport. Nolan has been playing for 4 years now and Coach Brian decided to step up to coach about 4 years ago. The Reffners have been with Bison LAX from the launch and love being a part of this extended family.

Nicole Dyrdahl- Coach

Coach Nicole grew up in Aurora, CO and is a lifelong lacrosse player and coach. She started in her youth through the city of Aurora, then played in high school at Rangeview and a year at  the University of Northern Colorado. She then went on to be the Head Coach of the Rangeview Girls Varsity lacrosse program for two seasons. She’s been coaching youth since and loves being a part of the Herd, where she can teach the youth the Creator’s Game.

Barb Baca- Coach

Coach Barb's passion for coaching started in 2008 in Albuquerque, New Mexico. She was playing women’s semi-professional football and coaching youth sports (basketball, tee-ball, volleyball, soccer, and softball). She moved here to Colorado in 2011 and continued to play women’s semi-professional football and coach youth basketball with Bear Creek (2011-2014). After a sports injury in 2015, she stuck to coaching youth sports with the City of Aurora (2015-2019) and women’s semi-professional football (2017-2020). She won a championship with the City of Aurora Youth Flag Football Program. Coach Barb's love for sports fuels her passion, which is coaching. Lacrosse is new to her and she is excited to join the Bison family.

Brett Fielder- Coach

Coach Brett is a native of Colorado, married and has 3 boys.  His love and passion for lacrosse started when his older two sons started playing at the ages of 9 and 11.  He has coached several different sports since the mid 90’s (from youth sports, competitive teams & High School).  Brett is very passionate about coaching and he feels truly blessed to have been involved with some wonderful programs. Through coaching Brett hopes to pass along the knowledge he gained from his involvement as a student, player and a coach.  Brett enjoys seeing young athletes carry out something positive that he has taught them whether it is on or off the field.  “It truly leaves me amazed and awestruck when these moments happen”.

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