Bumgarner sustained a fractured left hand late in spring training when he was hit by a line drive off the bat of Kansas City Royals infielder Whit Merrifield on March 23.

Right-hander Jackson Stephens was optioned to Triple-A Louisville and right-hander Kevin Shackelford was released to make room for DeSclafani’s activation from the 60-day disabled list.

—The Tampa Bay Rays placed right-hander Chris Archer on the 10-day disabled list (retroactive to June 3) with a left abdominal strain, recalling right-hander Diego Castillo from Triple-A Durham in a corresponding move.

—The Washington Nationals placed right-hander Jeremy Hellickson on the 10-day disabled list after he sustained a right hamstring strain on Sunday while covering first base in a game against the Atlanta Braves.

Washington also reinstated left-hander Tim Collins from the paternity list, activated left-hander Matt Grace (groin) from the 10-day DL and optioned right-hander Jefry Rodriguez to Double-A Harrisburg.

—The Boston Red Sox placed left-hander Drew Pomeranz on the 10-day disabled list (retroactive to June 2), recalling right-hander Brandon Workman from Triple-A Pawtucket in a corresponding move.

—The New York Mets activated third baseman Todd Frazier and right-handed reliever Anthony Swarzak from the disabled list, with right-hander Gerson Bautista optioned to Triple-A Las Vegas and left-hander Buddy Baumann designated for assignment in corresponding moves.