Sports With Littlefield: Celtics Protest Gun Violence; NCAA Final Four

The Celtics joined forces with the Sacramento Kings to protest gun violence in the wake of Stephon Clark's shooting. Also, the NCAA Final Four tournament is coming up on Saturday, a five-time Olympic medalist college swimmer goes pro, and the Bruins are doing better than expected.

Bill Littlefield, host of NPR's Only A Game, which tweets @onlyagamenpr.