Kelly was used in the Red Sox’ 5-4 loss to the Yankees on Friday and the team is swapping him out for a fresh arm. He has a 3.97 ERA, 1.25 WHIP and 61 strikeouts in 56 2/3 innings for Boston this year.

Kelly drew the starting assignment for the nightcap of Monday’s unconventional doubleheader marathon at Fenway Park by virtue of a suspended game resumption and reeled off three hitless frames, allowing just a pair of walks in the process. The 29-year-old righty has been excellent this season for the Red Sox, registering a sparkling 2.58 ERA, 1.09 WHIP and 56/22 K/BB ratio across 52 1/3 innings (42 appearances, three starts). There isn’t a ton of appeal here for fantasy managers in shallow mixers given his current swingman role, but he’ll probably make an impact in deeper mixed leagues and AL-only formats going forward.

Kelly hasn’t thrown more than inning since July 22, so this will be a short one. It’s unclear if the Red Sox will turn to Cooper Criswell afterwards or not. Criswell, who started last Wednesday, was originally announced as Tuesday’s starter, but that was changed to TBA yesterday.

With Boston’s top three relievers all absent, Kelly got the ball in a tie game in the ninth tonight. He pitched a scoreless inning then, but he failed to protect the lead after the Red Sox scored twice in the 10th. Hilliard’s homer made him the only one of seven batters to reach against Kelly, who has a nice 2.09 ERA in 38 2/3 innings this season. He could be a candidate for saves in the final two months if the Red Sox reverse course and opt to sell at the deadline.