During Boston Celtics' parade, Jaylen Brown wore a "State Your Source" shirt in response to ESPN's Stephen A. Smith's claims about his attitude.

During Boston Celtics' championship parade, Jaylen Brown wore a "State Your Source" T-shirt, referencing a disagreement with ESPN's Stephen A. Smith. Brown had previously asked Smith to reveal his source for claims that Brown has a negative attitude, which harmed his marketability. Smith declined, citing journalistic integrity. The shirt choice reflects Brown's displeasure with Smith's reporting.