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Slippery Rock Baseball Camps

Coaching Staff

Billy Messer  Assistant Coach / Camp Director

Billy Messer enters his fourth season as an assistant on head coach Jeff Messer’s staff after returning to his alma mater in the fall of 2012 following two seasons as Director of Baseball Operations at the University of Virginia.

Since returning to Slippery Rock, Messer has helped guide The Rock to a 86-59 (.593) and three consecutive Pennsylvania State Athletic Conference Tournament bids. Messer has also played an instrumental part in the development of Slippery Rock’s 19 All-PSAC, three All-America and five all-region honorees in the past three seasons.

At Virginia, Messer had a wide range of responsibilities as he is involved in every aspect of the program. He serves as the team's travel coordinator, and also assists with all aspects of game day operations and on-campus recruiting.

Messer is The Rock's recruiting coordinator, oversees the weight-training and conditioning programs, works with the infielders and hitters and serves as the team's third base coach.

The youngest son of Rock head coach Jeff Messer, Billy is a former four-year starter at second base for the Green and White.

Messer was a .317 career hitter at Slippery Rock and finished with 197 career hits in 181 games. Messer’s name can be found throughout The Rock’s record book as he ranks fifth in career doubles (43), 10th in RBI (109) and 11th in hits.

Messer was a three-time All-PSAC Western Division performer (two first-team, one second-team). Messer also received honorable mention NCBWA all-region honors and served as a team captain during his senior year in 2010. As a junior he was a second-team ABCA all-region performer and an honorable mention NCBWA all-region honoree.

As a student-athlete, Messer also served on the Student-Athlete Advisory Council all four years and was the organization's treasurer his senior year.

A native of Slippery Rock, Pa., Messer graduated from Slippery Rock in 2010 with a bachelor's degree in finance.

Bob Mitcheltree  Pitching Coach / Camp Staff

The 2016 season will mark Bob Mitcheltree’s 13th year as a member of head coach Jeff Messer’s coaching staff. Mitcheltree currently serves Slippery Rock’s pitching coach.

Under Mitcheltree, Slippery Rock has produced two All-America and 27 All-Pennsylvania State Athletic Conference pitchers. In 2013, the Oakland Athletics drafted pitcher Lou Trivino in the 11th round. 

Mitcheltree helped lead the green and white to two appearances in the NCAA Division II national tournament, two NCAA Division II North Atlantic Regional championships, one Pennsylvania State Athletic Conference championship, and three PSAC-Western Division titles.

His 2003 pitching staff finished the season ranked fourth in the nation in earned run average with a 2.87 mark. The Rock set a season record with 48 wins that year.

This season marks Mitcheltree’s 40th year as a baseball coach and he has coached over 50 teams during his time.

As head coach at Wilmington High school, his 1981 squad captured both the WPIAL title and the PIAA State championship.  He served as the head coach at Lakeview High School in 1977 and coached in the Youngstown Class “B” League for several summers.

As an assistant coach with Fabulous Goldsteins they won the 1980 Ohio Connie Mack State championship and his 1983 Buckeye Elks squad participated in the NABF world series.  Mitcheltree also served as the pitching coach at Westminster College for two seasons.

Mitcheltree played collegiately at Youngstown State University under the legendary Dom Rosselli.  He has scouted professionally for the St. Louis Cardinals, New York Mets, and San Diego Padres.  He operated his own pitching school for 15 years.

Mitcheltree has served the last 40 years as an assistant football coach at Wilmington High School.  He has helped lead the Greyhounds to the 2008 PIAA Class AA State championship, a state runner-up honor in 1988, two WPIAL titles, six state semi-final berths, and nine District 10 championships.  His son, T.D., was named first team all-state tight end his senior year as a Greyhound.

Mitcheltree was inducted into the Lawrence County Sports Hall of Fame in 2004, was named to the North County Baseball League Hall of Fame in 2011, and received a 25-year coaching award from the American Baseball Coaches Association in 2003.

Retiring in 2009, Mitcheltree taught in the Lakeview and Wilmington School Districts for a total of 37 years. He and his wife, Cindy, reside in New Wilmington and are the parents of two sons, T.D. (a former Rock football player) and Ryan. They have one grandson, Chase.