The Boston Celtics announcing via Twitter on Thursday that Joe Mazzulla is officially the 19th Head Coach in franchise history.

Mazzulla has been an assistant coach under Brad Stephens and Ime Udoka; he became the interim head coach after Udoka was suspended after allegedly violating Celtics internal policies. 

Mazzulla has directed the Celtics to the best recond in the NBAs Eastern Conference at the Association's All-Star Break.