NEW YORK — New York Mets General Manager Sandy Alderson is taking a leave of absence because his cancer has returned.

The 70-year-old made the announcement before Tuesday’s game against Pittsburgh. He was hired by the Mets after the 2010 season. He was diagnosed with cancer in 2015, underwent treatment and remained on the job, reducing his work schedule at times while undergoing treatment.

Assistant general manager John Ricco and special assistants JP Ricciardi and Omar Minaya will run the team’s baseball operations in Alderson’s absence.

New York reached the 2015 World Series after an Alderson-led rebuilding. But injuries have decimated the team since. The Mets started the season 11-1 but a lengthy slump left them at 31-45, fourth in the NL East.

CUBS: The team placed Kris Bryant on the 10-day disabled list with a sore left shoulder, one of several roster moves made before Tuesday’s game against the Dodgers in Los Angeles.

The Cubs also optioned Duane Underwood Jr. to Triple-A Iowa and placed reliever Justin Hancock on the DL with right shoulder inflammation.

Infielder David Bote and pitchers Luke Farrell and Dillon Maples were called up from Iowa.

ORIOLES: Right-hander Dylan Bundy was placed on the 10-day disabled list after spraining his ankle running the bases in an interleague game.

Manager Buck Showalter expects Bundy to spend the minimum time on the DL and return for a July 6 game in Minnesota.

Bundy is 6-7 with a 3.75 ERA in 16 starts. He leads the team in wins and strikeouts with 108.

Bundy hurt his left ankle rounding third base Saturday in a win over Atlanta. Bundy tested the ankle on flat ground Tuesday, but experienced pain in his landing foot.

Showalter has not yet decided who will start in Bundy’s place against Seattle on Thursday.

Left-handed reliever Donnie Hart was recalled from Triple-A Norfolk on Tuesday to fill out the pitching staff.

BREWERS: Milwaukee placed centerfielder Lorenzo Cain on the 10-day disabled list with a left groin strain and recalled outfielder Keon Broxton from Triple-A Colorado Springs.

Cain, who left Saturday’s game against St. Louis and did not play Sunday, was hitting .291 with eight homers and 26 RBI.

RANGERS: Texas placed first baseman Ronald Guzman on the seven-day concussion disabled list and recalled utilityman Ryan Rua from Triple-A Round Rock.

Guzman left in the sixth inning of a 7-4 win over San Diego on Monday after his head struck the knee of third baseman Christian Villanueva when the rookie was diving back on an attempted pickoff.