David Robertson was activated from the DL on April 22nd. He pitched in his first game since going on the DL on April 24th, the first of 3 games he pitched in 4 days before the off-day on April 28th.
Since then, D-Rob has appeared in 3 games. 3 games in the last 15 days. Prior to his appearance against the Brewers on Friday, he pitched only once in a week. Joe had chances to use him when it made sense in the 9th inning on Sunday and in the 8th inning last night and he chose not to do so. He explained last night's decision by saying he was planning on using D-Rob for 4 outs if Matt Thornton had been able to retire Lucas Duda.
I get not wanting to overuse a guy when he's coming back from a leg injury and I certainly don't want Joe to burn D-Rob out in May, but to use D-Rob as little as he's been used since he was activated is crazy. If he's available to get 4 outs, he should be available to get 5 and he should have been in the game after Thornton couldn't retire the righty last night. Giving up runs and losing games late because you don't use your best relief pitcher is unacceptable, especially when he's as well rested as D-Rob is.