John Carroll is a former basketball head coach for the NBA's Boston Celtics. He coached the latter part of the 2003-2004 season, temporarily replacing Jim O'Brien who had resigned. At the end of the season he was replaced as head coach with Doc Rivers.
In addition to coaching the Celtics, Carroll was the Head Basketball Coach at Bloomfield College, in Bloomfield, New Jersey from 1979-82. The Deacons were 42-38 under Carroll and advanced to the NAIA District Finals twice in three seasons. He went on to become an assistant coach at Seton Hall under P.J. Carlesimo for seven seasons before becoming the Head Basketball Coach for Duquesne University from 1989-1995. He compiled a 73-98 career record, which was highlighted with one winning season in 1993-94, when the Dukes went 17-13 overall (8-8 in the Atlantic 10 Conference). They earned a trip to the NIT, where they beat UNC-Charlotte in the first round but lost to Villanova in second round. Carroll was also the Atlantic 10 Coach of the Year for the 1990-91 season after leading the Dukes to a 10-8 conference record.
Carroll was a four-year starter at Dickinson College in Carlisle, PA, where he earned a degree in Psychology in 1977. A point guard at Summit High School, Carroll captained his senior team to the New Jersey State Championship.
Carroll now coaches for the New England Playaz AAU program.