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).

Weaver was injured Sunday while he stretched in the Yankees bullpen after warming up to pitch the ninth inning of a 7-3 win over the Dodgers. When Weaver reported feeling a grabbing in his hamstring, the Yankees went with left-hander Tim Hill to close over the victory.

The New York Yankees could be without their top reliever for more than a month. Righty Luke Weaver strained his hamstring while warming up for the ninth inning of Sunday's win over the Los Angeles Dodgers (NY 7,