Clay Martin – Varsity Head Coach

​Beginning his 15th season as head coach of the Trojans is Clay Martin.  A native Tulsan, Coach Martin graduated from Nathan Hale High School where he was an All-State football and basketball player.  Coach Martin began his collegiate career at the University of Tulsa where he played receiver on the Golden Hurricane football team.  Coach transferred to Oklahoma Baptist University where he was a four-year starter at point guard for the Bison. Martin was an all conference player for four years and was selected as a NAIA All American his senior season.  In 2011, Coach Martin was inducted into the OBU Athletics Hall of Fame. Martin began his coaching career as an assistant coach at the University of Texas-Pan American serving under Bob Hoffman.   In 2003 at the age of 28, Martin was named head coach of the Jenks Trojans. Martin and his staff have been a part of 228 victories and seven trips to the state tournament, both representing the most in Jenks basketball history.  In 2009, the Trojans broke five school records on their way to a 27-2 finish, the best record in school history before falling in the state championship game.  In addition to his coaching duties, Coach Martin serves as an Assistant Athletics Director for Jenks Community Education, and is a Referee in the National Football League.  Coach Martin has been married to his wife, Shannon for 20 years. The couple has two children: McKenzie (18) and Chase (15). 


Kalin Dahl – HS Assistant Coach

Kalin Dahl is beginning his 25th year as a Jenks Trojan.  A native of Rushford, Minnesota, Coach Dahl came to Tulsa to play basketball at ORU.  He is the only walk-on in the history of the program to letter four years.  After graduating from ORU in 1983, Coach Dahl stayed two more years at ORU serving as a graduate assistant and then as an assistant coach for the Titans.  Kalin then moved to Baton Rouge, Louisiana where he was head coach at Christian Life Academy for four years.  Coach Dahl then began his first stint at Jenks (1990-1996) coaching junior high for three years, then high school assistant for three years.  Dahl then returned to Baton Rouge as an assistant coach at perennial power Parkview Baptist School winning two state championships in 1997 and 1998 en route to a 73-10 record.  Kalin returned to the sooner state in 2000 as an assistant coach at Metro Christian Academy under Brooks Thompson, assuming head coaching duties early in the season and leading the Patriots into the area consolation championship game.  Coach Dahl then returned to Jenks in 2001 as an assistant coach.  He is very involved in all facets of the program, and is also responsible for helping Coach Martin with defensive adjustments.  In addition to his on the court duties, Kalin has a big role in leading the successful Jenks summer basketball camps.  Coach Dahl teaches physical education at Jenks Middle School, is the Middle School Athletics coordinator, and also coaches middle school track.  Married twelve years to the former Beth Bakkeby, Kalin now has three stepdaughters: Alex (24), Victoria (23), and Gabby (19).

Coach Martin on Coach Dahl: “I’m very fortunate to have worked with Kalin during my entire tenure at Jenks.  He not only brings out the best in the boys, but inspires me as well.”

Greg Calabrese – Assistant Coach / Junior Varsity

Beginning his 15th season in the Jenks Basketball program and his 12th as head junior varsity coach is Greg Calabrese.  Coach Cal is a 1992 graduate of Jenks High School and was a three-year letter winner in football.  After high school, Coach went to the University of Kansas and earned a degree in Business Administration while also playing junior varsity basketball under former Jenks coach, Joe Holladay. After graduation, Greg moved to Los Angeles where he met his future wife Kristin Burke and the couple had their son Colton. Wanting their son to be raised in the Jenks community, Coach Cal returned to Jenks to begin teaching and coaching.  In just his first year as a head basketball coach (2005-2006), Coach Cal led the freshman white team to an undefeated regular season and Frontier Valley championship.  Coach Calabrese is responsible for post play and rebounding for the Trojans. In addition to coaching basketball, Coach Calabrese is the Offensive Coordinator and Assistant Head Coach of the varsity football staff where he has tutored many division one players.  Greg is a teacher in the math department at the Jenks Freshman Academy. 

Coach Martin on Coach Calabrese – “Cal knows how to get the best out of anyone.  His energy and fire are contagious, and we’re better because of it!”

Mike Haesloop – Assistant Coach

​Returning to the Trojans bench is coach Michael Haesloop. This season marks his twelfth on staff including two seasons as head coach.  During his eleven seasons on staff, the Trojans have advanced to the State Tournament six times. Coach Sloop has coached in the Tulsa area for over thirty years including schools in the Tulsa Public Schools districts. Coach Sloop then turned his coaching to the AAU circuit, where he coached Trojan head coach Clay Martin, as well as over 30 Division 1 signees.  Since coming to Jenks, he’s coached every level of basketball in the program.  His junior varsity team in 2008-09 finished the season with a perfect record at 16-0.  Coach Sloop assists in the areas that include scouting and calling the inbounds plays.  Coach continues to operate is tax and accounting business and most importantly, has been married to his wife Sandy for 30 years.  The Haesloop’s have three grown daughters, Jennifer Nix, Kaitlin Davis, and Becca Haesloop, all of whom are Jenks alums and were Jenks cheerleaders. Mike and Sandy are the also the proud grandparents to twins Ella and Tatum.

Will Finfrock – HS Assistant & 9th Grade Maroon

Will Finfrock is in his 6th year on the Trojan basketball staff.  A Jenks lifer, Finfrock graduated from JHS in 2006.  Will was a student manager for the Trojan basketball team for three years in high school.  Will then went to Oklahoma State University and graduated in 2011 with a degree in History and Sports Management.  Will is very involved with the summer basketball camps and is currently the coordinator of the Trojan Hoops youth program.

Coach Martin on Coach Finfrock: “Will has taken on more and more responsibility each year.  He’s a bright young coach who has a great future ahead of him.”

Matthew Chamberlin – 9th Grade White

Clifton Harris, Jr. is a 2004 graduate of Bolingbrook High School located in the south suburbs of Chicago. Coach Harris was a three-sport varsity athlete (football, basketball and track) and earned varsity letters in all three sports for three years. Coach Harris earned individual awards in football and basketball as he was recognized as All Conference, All Metro, and All State. Upon graduation, Coach Harris went to play collegiate football at the University of Iowa where he received his Bachelor’s Degree in Business Administration with a minor in Finance. His career path post has taken him in many directions; Coach Harris pursued playing professional football as he was invited to a mini camp in 2009 with New York Jets (NFL) and in 2012 with the British Columbia Lions (CFL). During that time, Coach Harris landed a position as Regional Director of Sales for Kellogg’s Snacks and then becoming an Insurance Adjuster for AAA. He is currently a Special Education Instructor at Jenks East Elementary, Owner of Triumphant Legacy Athletix based in Jenks, OK. Coach Harris’s has 1 little princess Arden Grace (3). Coach Harris is very happy to be a Jenks Trojan!  

 Coach Martin on Coach Harris – “We’re very excited to welcome Clifton, and his family into the basketball family.  Clifton’s positive energy is obvious, I’m excited to watch him and his teams grow.”

Bruce Berkinshaw – 8th Grade Maroon

A 1988 graduate of Jenks High School, Bruce Berkinshaw is beginning his 15h year in the Jenks Trojan Basketball family.  During his time at Jenks, Coach Berkinshaw played basketball for four years earning two varsity letters. Coach Berkinshaw then went to Oklahoma State University earning a degree in Finance in 1992.  His career path since graduation has been in the communications industry working for companies including Fanch Communications and Charter Communications.  He is currently the Director of Product Operations for Cox Communications.  Coach Berkinshaw is married to the former Amy Kenny, a counselor at Jenks Southeast Elementary.  The couple has two daughters:  Reagan (20) and Hailey (18).

 Coach Martin on Coach Berkinshaw: “Bruce has been the glue that has helped our program for many years.  We are spoiled to have him working with our 8th graders.  Bruce bleeds maroon (and orange) and wants to see the program continue to climb to another level.”

Bradley Dolan – 8th Grade White

trojan basketball coaches 2019-2020