Not sure if you are watching the game, but he didn't struggle at all. He gave up a double, got 2 outs, and then got messed over by his infielders not communicating on a ground ball. They must have taken him out due to strategy, not poor performance.
a one trick pony and only has that big breaking ball that he has trouble throwing for strikes and a very mediocre FB (86-88 mpg)......Teams have learned to lay offthe breaking balland sit back on that fastball........I like Caleb but I'm very uncomfortable with him coming out of the pen except when we have a large lead........