No. 4: Kadeem Allen – guard – Arizona
A familiar face to our newest Celtics fans, Allen didn’t stick with Boston, but he did actually play for them as a two way player for 18 games in the 2017-18 NBA season.
A 6-foot-1 combo guard who worked his way through community college ball before joining the Wildcats, Allen is the definition of a grinder. While the Celtics would end up waiving him, he latched on to the New York Knicks, for whom he still plays as a two way player.