Red Sox activate RHP Brayan Bello from 15-day IL

The Boston Red Sox reinstated right-hander Brayan Bello from the 15-day injured list to start Sunday's game against the visiting Washington Nationals.

Fellow right-hander Josh Winckowski was optioned to Triple-A Worcester to make room for Bello, who last pitched for Boston on April 19. Bello landed on the injured list five days later because of lat tightness.

Sunday will mark Bello's first career appearance against the Nationals, who, like the Red Sox, will seek a series victory.

Bello, who was Boston's Opening Day starter, is 3-1 with a 3.04 ERA in five starts this season.

Bello, who turns 25 on Friday, is 17-20 with a 4.22 ERA in 46 career appearances (44 starts) in three seasons with the Red Sox.

Winckowski, 25, is 1-1 with a 3.33 ERA in 12 appearances (three starts) this season.

He is 10-12 with a 4.12 ERA in 87 career games (18 starts) with Boston.