Obviously Perez was far from spectacular, but I don't get at all why Roenicke used Covey. The guy has been on the team for 2 days after being released by the Tigers. It was a close game, the Sox just got back in it, and after yesterday's blowout, the good bullpen arms were all still available.
And in a normal season, I get resting players. but this year is a sprint. I'm sure many have asked about why no Bogaerts, but it really made no sense...