May 16: LHP Chris Sale resumes throwing
In an important development, Sale has resumed his throwing program after being shut down at the beginning of the month due to a non-baseball medical issue. 

“He started playing catch. From where we were a few weeks ago to there, that’s a good sign,” said manager Alex Cora. 

Sale’s original injury was a stress fracture in his right ribcage that he suffered during the lockout in late February. The Red Sox hope he will be ready to return to action in mid- to late-June. Sale was placed on the 60-day injured list prior to the start of the season. -- Ian Browne

May 16: RHP Michael Wacha tunes up for return

Wacha, who was Boston’s best starting pitcher this season before suffering an intercostal injury, fired two innings and threw 35 pitches in a simulated game on May 16. The hope is that Wacha will reclaim his spot in the rotation on May 20, the first day he is eligible to be activated from the 15-day injured list. 

“Let’s see how it feels after [the sim game], how he feels tomorrow, then we'll make a decision if [his next start] is right after,” said Red Sox manager Alex Cora. -- Ian Browne