DIAMOND CLUB TEAM
Jeff Doland played college baseball at Oral Roberts University and at Colorado School of Mines. Jeff oversees all of Diamond Club's business operations, player development, programing, and instruction.
Coach Doland has been a professional hitting instructor for 24 years and has instructed at numerous camps throughout the country. He has spent the past 13 years as an Associate Scout with the Colorado Rockies and is the Manager of the Colorado Rockies Scout Team. Prior to joining the Rockies, Jeff served as the Hitting Coach for the Los Angeles Angels Scout Team and spent two fall seasons with Cherry Creek High School.
Jeff Doland - Managing Partner
Director of Operations and Player Development
Hitting and Catching Instructor
Brad Mulvaney graduated from Arvada West High School in 1992 where he was drafted by the Cincinnati Reds. He played college baseball at the University of Arkansas and one year of professional baseball in the Independent Prairie League. He has coached at Springdale High School in Springdale, Arkansas where he helped lead the Bulldogs to the 5A state championship and was the head coach at Arvada High School for ten years. Coach Mulvaney has helped numerous athletes receive college scholarships and 3 of his former players have gone on to play professional baseball.
Brad Mulvaney - General Partner
Director of Youth Tournament Teams
Hitting and Defense Instructor
Wayne Doland is a former first-round draft choice of the Chicago Cubs and played in the Cubs organization from 1975-1978. After a successful career in the corporate world and doing private pitching instruction, he returned to the field as the pitching coach at Arvada High School (1998) and at Colorado School of Mines from (1999-2001).
Coach Doland has scouted for the L.A. Angels, N.Y. Mets, Houston Astros and currently for the Colorado Rockies. He owned and operated All-Star Pitching Clinic, Inc for 26 years and had over 60 players drafted by Major League Baseball. Coach Doland is the Director of the Colorado Rockies Scout Team Program.
Wayne Doland - General Partner
Director of Colorado Rockies Scout Team
Kyle Tinius graduated from Broomfield High School in 2011. He attended college at Lamar Community College and West Texas A&M University. During his career at West Texas A&M University Kyle became the program leader in single season saves with 14. He was named 2nd Team All Conference in 2015 and 1st Team All Conference and Lone Star Conference Tournament MVP in 2016. Tinius played three seasons of professional baseball in the Frontier League with the Southern Illinois Miners. Following the conclusion of his playing career, Tinius spent three seasons as the Associate Head Coach and Pitching Coach for Southwestern College in Kansas. He then moved to Frank Phillips College, in Texas, as the Assistant Coach. Kyle Tinius is a former Colorado Rockies Scout Team player and took Catching and Pitching lessons from Jeff and Wayne starting from age 6.
Kyle Tinius - General Manager
Director of Pitching
Instructor | Scout Team Coach
Jennifer (Stewart) Barrett was born and raised in Yukon, OK. After high school, she attended the University of Oklahoma on a softball scholarship. A few of Jennifer’s softball accomplishments include being a two-time All American, two-year WCWS All-Tournament Team selection, and the 2000 WCWS Most Outstanding Player which was OU’s first softball national championship. After graduating from OU, Jennifer was an Assistant Division I Softball Coach at Coastal Carolina University and Texas Tech University. Jennifer then played one season of professional softball for the Philadelphia Force.
In 2007, Jennifer retired from softball and entered the private sector as a production and engineering tech at QEP Energy until 2014. At QEP, Jennifer met Cody Barrett and the couple married in 2011. Jennifer and Cody are proud parents to two children. Along with being a full-time mom, Jennifer owned/operated a yoga studio from 2018 to 2022 and coaches a competitive softball team.
Jennifer Barrett
Executive Assistant to the Managing Partner
Jarett Hack graduated from Golden High School, before playing college baseball at both Independence CC and Emporia State University. Coach Hack began his career at Diamond Club in 2015 as an assistant before being promoted to a head coach in the high school program and a camp director. Coach Hack has a MS Degree in Biomechanics/Exercise Physiology from Emporia State. He has spent the last five years as a Rockies Scout Team coach and a lead instructor at Diamond Club.
Jarett Hack - Instructor
Hitting and Pitching I Scout Team Coach
Wyatt Featherston played seasons at Western Kentucky University, College of Southern Nevada, and Washburn University. In 2016, he was drafted in the 34th round of the MLB Draft by the Colorado Rockies. Featherston spent 2 seasons as the assistant coach at Porterville College, where he coached two CVC Gold Glove award winners and sent 15 players to 4-year-programs.
Coach Feathertson spent two years as an assistant and one year as the manager of the Fresno A’s Collegiate Summer team. During his season as manager, the team set several records including wins in a single season, runs scored, strikeouts, stolen bases, and ERA. During his time with the A’s, Featherston sent 10 players to 4-year-programs and two players signed professional contracts.
Wyatt Featherston - Instructor
Hitting and Defense Instructor
Grace Gonzales graduated from Pueblo West High School (Pueblo, CO) where the was a two-year captain, city Offensive Player of the Year and PWHS Female Athlete of the Year in 2019. Grace played college softball at Colorado School of Mines, where she was twice selected as an Easton/NFCA All-America Scholar Athlete (’22-’23).
Grace began her coaching career at Diamond Club in 2024 providing softball instruction. She is passionate about building athletes who are dedicated, competitive, and resilient both on the field and in life.
Grace Gonzales - Instructor
Softball HItting and Catching Instructor