"He could play, but it's just one of those where we don't want him to reinjure it and be out for any longer than he has to be," manager Robin Ventura said.
Pierzynski suffered the injury in Monday's series opener against the Twins while swinging and brought his discomfort to Ventura's attention following the game. The injury doesn't affect Pierzynski while throwing, only hinders him when he swings.
Backup Tyler Flowers, who went 1-for-4 with a walk Tuesday, received consecutive starts for the first time this season.
Ventura said he's hopeful that sitting Pierzynski on Tuesday and Wednesday, coupled with Thursday's off-day, will make the veteran good to go for Friday's series opener vs. the Rangers.
"It's just one of those you never know how bad it's going to be," Ventura said. "For him, he's a tough guy. He could probably play through it, but again, if he injures it worse, he'll probably end up on the DL, so it's just better to be protective of it."