New York Yankees closer Luke Weaver received a platelet-rich plasma injection designed to speed healing in his injured left hamstring, according to the Associated Press (h/t ESPN).

Yankees closer Luke Weaver had a platelet rich plasma injection in his injured left hamstring, and designated hitter Giancarlo Stanton is on track to start a minor league rehabilitation assignment next week.

Aaron Boone didn’t sound overly optimistic late Sunday while discussing Luke Weaver, who had to cut his warmup short in the bullpen before the ninth inning of that night’s game at Dodger Stadium because he “felt something” in his left hamstring. Boone’s fears were soon confirmed.