2 reasons why it was a bad idea
1. Sanchez was pitching great. Yes, he gave up 1 solo HR, but he was well rested, and still way under 100 pitches
2. Corbin is a starter and not used to coming in relief, so you don't know what you're going to get. AND, he has only had 2 days rest since game 1. He wasn't at full strength, and not as aharp!
Corbin came in to face a line of lefties. Either he or Doolittle were good options