A former CSI Baseball graduate and All-American, Tom Tierney, joins the Baseball coaching staff in September 2025 ahead of the 2026 Baseball season. Tierney, a former professional player, high school coach, and educator, brings plenty of experience and a championship pedigree to the program. He has 25 years of experience coaching at the high school level and is both a five-time PSAL City Champion and four-time Coach of the Year award winner.
Tierney spent two years in the Braves Minor League system before moving on to a storied coaching career that places him among the most decorated Baseball coaches in Staten Island history. After spending five years as an assistant on his father's staff at Tottenville High School, he became spent three seasons as the head coach at New Utrecht High School from 1997-1999.
During a tenure at Tottenville that spanned from 2000-2016, Tierney won five PSAL titles and was named Coach of the Year by the PSAL four times. The North East Region Coach of the Year in 2001 would ultimately spend 25 years at Tottenville teaching Physical Education and Health from 2000-2025. His retirement from teaching then opened the door for him to join his longtime best friend at the College of Staten Island, Mike Mauro, re-uniting the former teammates on the same coaching staff for the third time.
Tierney competed at John Jay College from 1988-90 and then transferred to CSI for his senior season in 1991 where he went on to graduate with a degree in Sociology. During his lone season with the Dolphins, he posted a .504 batting average and a 1.580 OPS and still ranks among the all-time program leaders in single-season batting average, hits, RBI, home runs, and slugging. Following an extraordinary season with the Dolphins, he was named an All-American and went on to sign a professional contract with the Atlanta Braves.
