Jerome Byron Allen (born January 28, 1973) is an American former professional basketball player and college head coach.

His family struggled to make ends meet, and he lived with 18 relatives in a five-bedroom home, sharing a bed with his sister.

[1] Allen was a four-year starter at Penn alongside future NBA players Matt Maloney and Ira Bowman.

[5] Allen also spent time in France, Italy (with Lottomatica Roma, Carpisa Napoli and Snaidero Udine), Greece, Spain and Turkey.

[7] On December 14, 2009, Allen was named interim head coach of the Penn men's basketball team after the firing of Glen Miller.

In summer 2021, Allen announced he was leaving the Celtics' coaching staff to join Dwane Casey in Detroit.

[15] On February 26, 2020, the NCAA announced penalties against Allen and the Penn men's basketball program stemming from the bribes.

In an unusual move, if Allen gets a head coaching job after the show-cause expires, he must sit out the first half of the first season of his return.