The first inkling that something was amiss came when Donnie Collins of the Times-Tribune in Scranton/Wilkes-Barre mentioned Dellin Betances's absence from the starter's list in his piece this morning about the Triple A RailRiders:
Dellin Betances is not listed among the starters for the RailRiders during the upcoming four-game series with Gwinnet. He is on turn for Friday, and he was listed on the board for side work. My guess is that they’re holding him out in case the Yankees need the extra arm for Monday’s doubleheader in Cleveland.
After further investigation, Joel Sherman of the New York Post, prompted by Collins's post, found out that Betances wasn't on the list of starters because he is being moved to the bullpen.
Sherman also declared the Killer B's dead. The killer B's being Manny Banuelos, Dellin Betances and Andrew Brackman. Banuelos is recovering from Tommy John surgery, Brackman hasn't panned out and now Betances is the last man standing.
He is out of options so the Yankees have decided to do what most teams do with failed starters, move him to the bullpen.
So far this season, Betances is 2-2 with a 6.00 ERA in six starts with the RailRiders. This past weekend, in his last start, Betances threw five no-hit innings but he walked four batters. And that seems to be his downfall. He has 16 walks in 24 innings. He can't get a good rhythm going and his mechanics get out of whack.
The Yankees believe moving Betances to the bullpen is the wisest decision. They hope he can use his high end pitches to his advantage in short outings.