If you're a Patrick Corbin owner, I wouldn't worry too much about the 23-year-old Diamondbacks' hurler being shut down because of an innings limit.
Last season, he totaled 186 1/3 innings between the minors and majors. In 2011, he pitched 160 1/3 innings in the minors. This season, Corbin is at 130 1/3 innings through 19 starts and on pace for 224 1/3 innings. While it's unlikely Corbin makes it to that many innings, he should give 200 innings a run, so Fantasy owners should get plenty of use out of the left-handed hurler in the second half.
The only concern you should have is how well will Corbin perform in the second half after going 11-1 with a 2.35 ERA and 1.00 WHIP in the first half. Corbin's FIP (3.18) and xFIP (3.52), per FanGraphs.com, indicate his ERA should be higher. Corbin also has an 81.9 percent strand rate, which is above his career average (76.5 percent) and the league average for starters (72.1 percent).
You have to expect somewhat of a regression for Corbin after an oustanding first half, but that's far from saying it's time to sell the lefty in Fantasy. It just means keep expectations realistic.