Dodgers add four pitchers to IL, bringing total to seven out
Los Angeles also recalled right-hander Landon Knack from Triple-A Oklahoma City.
Buehler is recovering from Tommy John surgery on Aug. 23, 2022. Graterol has right shoulder inflammation and has not pitched in a game since his spring training debut March 2.
Treinen has a bruised lung sustained March 9 when he was hit by a line drive off the bat of the Texas Rangers’ Sam Huff, and Sheehan has right forearm inflammation.
They joined left-hander Clayton Kershaw and right-handers Dustin May and Tony Gonsolin on the IL.
Kershaw, a three-time Cy Young Award winner, had left shoulder surgery Nov. 3. May had Tommy John surgery July 18 and Gonsolin on Sept. 1.
Knack had been optioned to minor league camp on March 3.