Mets RH reliever Anthony Swarzak (left oblique strain) will begin playing in rehab games this week, the Mets announced.
Swarzak, who cannot return until May 31 at the earliest, threw a bullpen in St. Lucie on Tuesday.
Mets manager Mickey Callaway said last week that the team views Swarzak as a pitcher who will be used in a variety of spots upon his return, including high-pressure situations.
"We look at him as a guy that can get righties and lefties out in any situation from the fifth inning on," he said.
The 32-year-old Swarzak, who has been out since April 1 and is on the 60-day DL, signed a two-year, $14 million deal this offseason.
He had a 2.33 ERA (2.74 FIP) and 1.03 WHIP with 91 strikeouts (a career-high 10.59 K/9) in 77 1/3 innings (70 games) last season for the White Sox and Brewers.