There's a wide range when it comes to "strains".
Depends on how severe it was, and how fast it can heal,I guess.
I'm nor sure I buy that Mookie is going to beat himself up like Pedrioia has.
Aside from a possible collision with a wall or awkward dive, I don't see him throwing himself around like Pedrioa.
If I see him starting to dive into first base, i might change my mind.