Joe Mazzulla's stepson makes Division 1 college football commitment Jason Snow June 23, 2026, 4:05 a.m. ET Harden Jr., the stepson of Celtics head coach Joe Muzzulla, is a 6-2, 215-pound outside linebacker that will enter his senior campaign next fall. Under third-year coach Bill O'Brien, Boston College adds Harden Jr. to the 56th-ranked 2027 recruiting class in the nation, according to On3 and Rivals.