- Oakland A's starter A.J. Griffin will undergo Tommy John surgery, according to CBSSports.com's Jon Heyman. The A's are already without Griffin's fellow starter Jarrod Parker, meaning Bob Melvin will have to stick with his current rotation for the remainder of the season and hope its league-best 2.89 ERA can continue.
- New York Yankees starter Michael Pineda will miss three to four weeks after an MRI revealed a shoulder strain, according to the New York Daily News' Roger Rubin.
- The Los Angeles Dodgers recalled left-handed reliever Paco Rodriguez from Triple-A Albuquerque, optioning Carlos Triunfel to Triple-A, the team announced.
- The Toronto Blue Jays released right-hander Mickey Storey and purchased second baseman Chris Getz's contract from Triple-A Buffalo, according to a team announcement.
- The Washington Nationals recalled right-hander Ryan Mattheus from Triple-A Syracuse and optioned right-hander Taylor Jordan, per a team announcement.
- The Miami Marlins activated third baseman Ed Lucas from the 15-day DL and designated first baseman Greg Dobbs for assignment, the team announced.
- The Oakland Athletics optioned right-hander Fernando Rodriguez to Triple-A Sacramento after reinstating him from the 15-day DL, according to a team announcement.
- The Baltimore Orioles signed free agent left fielder Steve Pearce to a major league contract, the team announced.
- Miami Marlins starter Jose Fernandez allowed just two hits over eight shutout innings as the Marlins blew out the Atlanta Braves by a score of 9-0.
- Cincinnati Reds outfielder Billy Hamilton hit his first career home run as part of a 3-for-4 day in which he scored twice and also stole a base.