On the one hand, Pearson is such an unknown. Even when he's been healthy, he's up and down and there isn't enough time to really take a look at him this year.
On the other hand, if our pen is on fumes and we need some real gas, it's nice to have that arm to go to and take your chances with. Besides, if he's ever going to be a key contributor to this team, you need to throw him into these situations.
But who would he replace? Pop? I guess, but Pop is good when we need ground balls or to keep dangerous hitters in the ball park. I won't blame Jays management either way on the Pearson decision.