​Guy Conti, a longtime MLB coach who mentored Pedro Martinez early in the pitcher’s Hall of Fame career, died Tuesday, Oct. 13. He was 84.“We lost a good one today,” longtime Mets PR chief Jay Horwitz wrote on X. “Guy Conti, our former bullpen coach and special adviser, passed away after a lengthy illness. Guy was a friend of Sandy Koufax and beloved by Pedro Martínez. No one had more stories than Guy. His knowledge reached people for decades. Miss you my friend.”A native of Freeport, Pa., Conti attended Clarion State College, where he played baseball and football. The Houston Colt .45s signed him after his freshman season, and he played one year in the minor leagues before a shoulder injury ended his professional playing career.MORE: Dodgers remove utility infielder from roster immediately before NLCSQuickly turning to coaching, Conti taught and coached baseball and football at Albion High School in Pennsylvania before joining the staff at Edinboro State College, where he coached baseball, football and basketball.Conti spent nine years as Edinboro’s head basketball coach, compiling a 140-98 record. His teams won two Pennsylvania State Athletic Conference West Division titles, in 1975-76 and 1981-82. The 1981-82 team reached the NCAA Division II tournament, and Conti was inducted into Edinboro’s Hall of Fame in 1997.Conti helps Martinez on road to Hall of FameWe lost a good one today. Guy Conti our former bullpen coach and special adviser passed away after a lengthy illness. Guy was a friend of Sandy Koufax and beloved by Pedro Martínez. No one had more stories than Guy. His knowledge reached people for decades. Miss you my friend. https://t.co/4Sji32jogi— Jay Horwitz (@Jay_HorwitzPR) October 13, 2026In the 1980s, Conti began working as a part-time coach and scout for the Pittsburgh Pirates. He joined the Los Angeles Dodgers organization in 1986 and held a series of minor-league coaching positions, including roving pitching coach and minor league pitching coordinator.MORE: Dodgers’ Dave Roberts reveals Miguel Rojas’ status for NLCSWhile with the Dodgers, Conti met Martínez, then a young pitcher in the organization who would become a Hall of Famer over an 18-year MLB career. Conti helped him refine his changeup, a pitch that became central to his success, and encouraged him to learn English. Martínez later referred to Conti as his “white daddy,” a reflection of the close relationship they developed during his early professional career.Conti joined the New York Mets organization in 1999 as a minor-league manager and went on to serve as a minor-league coach and field coordinator. He was the team’s bullpen coach from 2005-08, working under manager Willie Randolph. He later served as the Mets’ pitching rehabilitation coordinator, helping pitchers recover from injuries and return to competition.—Enjoy free coverage of the top news & trending stories with The Big Lead Newsletter—