Giants manager Bob Melvin said Wednesday that Harrison (shoulder) is unlikely to be activated from the 15-day injured list before the season ends Sept. 29, MLB.com reports.

Though the left shoulder inflammation that sent Harrison to the IL on Sept. 6 has been deemed mild following an MRI, the young southpaw won't be asked to ramp back up with little time left in the season. Harrison had already logged a career-high 124.1 innings prior to being deactivated, which is likely a factor in the organization's decision to shut him down. Over his 24 starts this season, Harrison went 7-7 with a 4.56 ERA, 1.34 WHIP and 118:42 K:BB.