MLB Transactions from July 30, 2016

Arizona Diamondbacks optioned Zac Curtis to Mobile BayBears.
Texas Rangers sent 3B Matt Duffy outright to Round Rock Express.
Los Angeles Angels designated LF Craig Gentry for assignment.
Los Angeles Angels activated LF Craig Gentry from the 60-day disabled list.
Los Angeles Angels designated LF Daniel Nava for assignment.
Los Angeles Angels activated LF Shane Robinson from the 15-day disabled list.
Arizona Diamondbacks designated 1B Mike Freeman for assignment.
Arizona Diamondbacks designated RHP Josh Collmenter for assignment.
Arizona Diamondbacks selected the contract of Steve Hathaway from Reno Aces.
Arizona Diamondbacks selected the contract of Adam Loewen from Reno Aces.
Miami Marlins activated RHP Colin Rea.
Miami Marlins activated RHP Andrew Cashner.
San Diego Padres optioned Keith Hessler to El Paso Chihuahuas.
San Diego Padres activated RHP Jarred Cosart.
New York Mets placed SS Jose Reyes on the 15-day disabled list retroactive to July 27, 2016. Left oblique strain.
New York Mets transferred RHP Matt Harvey from the 15-day disabled list to the 60-day disabled list. Thoracic outlet syndrome.
New York Mets signed free agent RF Justin Ruggiano.
Washington Nationals sent RHP Joe Ross on a rehab assignment to Syracuse Chiefs.
Oakland Athletics optioned Brett Eibner to Nashville Sounds.
Kansas City Royals optioned Billy Burns to Omaha Storm Chasers.
Oakland Athletics traded CF Billy Burns to Kansas City Royals for CF Brett Eibner.
Washington Nationals traded LHP Felipe Rivero and LHP Taylor Hearn to Pittsburgh Pirates for RHP Mark Melancon.
Miami Marlins sent 1B Don Kelly outright to New Orleans Zephyrs.
Miami Marlins recalled Brian Ellington from New Orleans Zephyrs.
Miami Marlins optioned RHP Jose Urena to New Orleans Zephyrs.
Washington Nationals recalled RHP Reynaldo Lopez from Syracuse Chiefs.
Oakland Athletics recalled LHP Dillon Overton from Nashville Sounds.
Boston Red Sox sent RHP Craig Kimbrel on a rehab assignment to Pawtucket Red Sox.
San Francisco Giants sent 3B Matt Duffy on a rehab assignment to Sacramento River Cats.
San Francisco Giants designated 2B Ramiro Pena for assignment.
San Francisco Giants activated RF Hunter Pence from the 15-day disabled list.
Seattle Mariners recalled Cody Martin from Tacoma Rainiers.
Seattle Mariners placed RHP Nathan Karns on the 15-day disabled list. Low back strain.
San Diego Padres traded RF Matt Kemp and cash to Atlanta Braves for LF Hector Olivera.
Oakland Athletics placed LHP Rich Hill on the 15-day disabled list retroactive to July 20, 2016. Left middle finger blister.