[four-man rotation]
5/2 yankees
5/6 twins [switch to five-man]
5/11 white sox
[start falls on off-day 5/16, switch to four-man rotation with #2 starting on 5/17]
5/25 a's [return to five-man]
5/29 mariners
[four-man rotation through 6/12, sufficient rest possible]
6/13 brewers [return to five-man]
6/19 cardinals
6/24 marlins
6/29 blue jays
[switch to four-man after 7/4]
7/9 tigers [return to five-man]
[switch to four-man on 7/17]
7/22 orioles [return to five-man]
7/27 red sox
[start falls on off-day 8/1, switch to four-man]
8/15 yankees [return to five-man]
8/21 rangers
8/25 indians
[#2 starts on 8/31, switching to four-man]
9/9 blue jays [return to five-man]
9/15 yankees
9/20 red sox
[start falls on off-day 9/26]
10/1 orioles

Plus it would only give him 19 more starts this season. Though if he could go, say, 12-5 over that span (i know, i know), it would probably be worth it.