Chris Perez suffered a strained internal oblique on his left side during his first bullpen session of Thursday, February 23rd.

According to Head Athletic Trainer Lonnie Soloff, the recovery time is 4-to-6 weeks (which is typical for an oblique strain) and the hope is to have him in exhibition games towards the end of March based on his response to treatment.

Opening Day has not been ruled out at this time since his build-up time is less than that of a starting pitcher.