Pirates' Mitch Keller: Pulled early with back tightness

Keller was removed early from his start with High-A Bradenton due to back tightness.

With the diagnosis of back tightness, it's likely that Keller was lifted early for precautionary reasons. Through his first 39 innings with Bradenton, the promising prospect has posted a 2.54 ERA and 38:7 K:BB ratio. He'll be listed as day-to-day until further information regarding his condition becomes available.