BOSTON -- Boston Celtics rookie Jayson Tatum threw out the first pitch before the Boston Red Sox's series finale against the Tampa Bay Rays on Sunday.

It has become a yearly tradition for the Celtics' first-round draft pick to throw the first pitch at Fenway Park.

Tatum chose to go to the full wind-up and made a pretty decent pitch to Deven Marrero.

The Celtics selected Tatum, a Duke product, third overall. The 6-8, 205-pound small forward averaged 16.8 points per game and 7.3 rebounds last year in college.