The Yankees have already placed him on the disabled list.
On Friday, the Yankees announced that Michael Pineda has a partially torn ulnar collateral ligament in his right elbow and that, though he'll seek a second opinion, the recommendation is Tommy John surgery.
The Yankees do have depth in their rotation with CC Sabathia, Luis Severino and Masahiro Tanaka to get by without Pineda, although Tanaka's struggled mightily this season. Bryan Mitchell will start the day game of Sunday's doubleheader.More news: One Bradley Lowery: Farewell to our little fighter
A patchwork starting rotation is not ideal for a team that claims to have playoff expectations in 2017. That is what they have done after every other injury this season, so why change now?
The GM previously said the Yankees looked to be buyers before the trade deadline, but one of the team's prime targets - former White Sox lefthander Jose Quintana - was dealt to the Cubs on Thursday.
For his Yankees career, the often-frustrating Pineda is 31-31 with a 4.16 ERA. He started the year with Double-A Trenton, where he went 4-0 with a 1.03 ERA, 1.086 WHIP and 32 strikeouts in six starts before getting promoted to Scranton. They could also look outside the organization, but it's unlikely that Brian Cashman will want to trade significant talent to upgrade in the middle of a season that, however promising it has been to date, was meant to be a transition and building year for the Bombers.