You're not just giving Rusch extra work, you're also giving it to Z and Prior. It equates to one extra start through the month of April. If they went with a 5 man rotation thru April, the #1 starter will get 5 starts, his 5th start will be on April 28th. If they go w/a 4 man rotation, the #1 starter will have 6 starts, with his 6th start on April 28th. That's an extra start and approx. 160-180 extra pitches that could be saved. I agree with you on the extra rest in June/July, I'd have each starter skip a spot in the rotation twice, Interleague and the DH all ow the perfect time to do so, IMO. If you have the chance to give a starter some rest, use it.