Glasnow left Saturday's game against the Phillies with an apparent injury, Travis Sawchik of the Pittsburgh Tribune-Review reports.
It wasn't obvious what exactly was ailing Glasnow, but he appeared to be favoring his back or side after delivering a pitch to Peter Bourjos in the fourth inning. Glasnow was likely headed back to Triple-A Indianapolis anyway, as he struggled both with his command and in controlling the running game (five stolen bases allowed) in his three-plus innings, and Ryan Vogelsong (eye) is expected to slot into the rotation in the near future.