Here's my idea - make him the 5th starter out of Spring Training (assuming he earns it).
There are 4 off-days in April plus the inevitable weather cancellations. If those become his turns in the rotation he gets skipped at least twice and can be used as a fireman in between starts. So March/April he gets 3 starts (15 innings) and say 4-6 relief appearances (6 innings) = 21 innings.
There's only one off day in May but Pineda comes back mid month. Slide Graterol to 6th starter or otherwise work him in tandem with the remaining 5th starter so he gets a similar 3 starts and 4-6 relief appearances. 20 innings a month is 120 for the season with gas in the tank for October.
