You're going to hand Mejia a spot in the rotation after 25 innings last season? I say it's 50/50 he starts on the DL. The time to win is now. If Mejia becomes a world beater, we can DFA Perez or move him to the pen.
We were a .500 team after May 1st last season. This is not the time to worry about the future, player development etc. This is the time to win and it's a no-brainer that Perez is in a better position to help us win than Mejia out of the gate.
Mejia only got 25 innings because the Twins signed Lance Lynn, thus removing him from the rotation. He did suffer through some injuries, like missing a month at Rochester and most of September, but if it wasn't for Lynn he would have had another 10-15 starts. My problem with Perez isn't depth, but the total lack of upside for a guy who is going to be locked into a roster spot until he pitches his way out of it.