Orioles manager Buck Showalter said Wednesday that Jake Arrieta will join the starting rotation with Triple-A Norfolk.
Red Sox agreed to terms with first-round pick LHP Trey Ball.
The Phillies have promoted prospect third baseman Maikel Franco to Double-A Reading.
Orioles manager Buck Showalter said that Nolan Reimold (hamstring) felt good after his first rehab game with Double-A Bowie on Tuesday.
Jaff Decker will be recalled from Triple-A Tucson on Wednesday.
Jon Heyman of CBS Sports reports that people who have spoken with MLB investigators feel it's likely that "at least some" suspensions will be issued in the Biogenesis case.
Nationals activated 2B Danny Espinosa from the 15-day disabled list; optioned him to Triple-A Syracuse.
Nationals general manager Mike Rizzo said on 106.7 The Fan on Wednesday that Bryce Harper (knee) will resume baseball activities in "the next day or two."