SAN FRANCISCO -- Outfielder Austin Slater, whose performance has been among the few redeeming aspects of the Giants' season, will be sidelined for two to three months with a torn right adductor muscle.
NBC Sports Bay Area initially reported Slater's diagnosis, which was confirmed to MLB.com by an industry source. Slater underwent an MRI on Saturday that confirmed the injury's extent.
Slater was sidelined briefly with tightness in his right hip flexor late last month. He returned to the lineup but sustained his new injury while sprinting to first base in the eighth inning of the Giants' 6-1 loss Friday to the Marlins.
Slater, 24, was 29 games into his rookie season with the Giants. He compiled a slash line of .290/.343/.430 with three home runs, 13 RBIs and 13 runs scored.
Slater had won the Giants' everyday role in left field, where 11 players have started this season. Gorkys Hernandez started in left for the Giants on Saturday, but Mac Williamson, called up to replace Slater on the roster, and possibly even first baseman Brandon Belt are other alternatives who Giants manager Bruce Bochy could consider.
It's Williamson's second stint at the Major League level this season. He hit .161 (5-for-31) with one homer and four RBIs during 10 games in late May. In 49 games at Triple-A Sacramento, he was batting .238 with nine homers and 32 RBIs. Slater joined the list of injured Giants position-player prospects, which includes Ryder Jones (bruised right wrist) and, at Triple-A Sacramento, Christian Arroyo (broken hand).