Red Sox prospect right-hander Rubby De La Rosa was scratched from Tuesday's start with Triple-A Pawtucket for precautionary reasons after he tweaked a muscle in his side.
Phillies recalled RHP Tyler Cloyd from Triple-A Lehigh Valley.
Phillies placed C Carlos Ruiz on the 15-day disabled list, retroactive to May 20, with a right hamstring strain.
Nationals prospect Anthony Rendon started at second base Monday night for Double-A Harrisburg.
According to Andy Martino of the New York Daily News, the Mets have discussed demoting Ike Davis, Ruben Tejada, and Jordany Valdespin.
Gordon Beckham (hand) started at shortstop Monday in his third rehab game with Triple-A Charlotte.
Rangers activated C A.J. Pierzynski from the 15-day disabled list.
Nationals purchased the contract of LHP Fernando Abad from Triple-A Syracuse.