Luke Weaver injured his hamstring preparing for Sunday's game against the Los Angeles Dodgers, potentially costing the New York Yankees their star closer for over a month.

New York Yankees closer Luke Weaver is expected be placed on the injured list after injuring his hamstring warming up Sunday night, sources tell ESPN. Weaver underwent an MRI and could miss four to six weeks, though the official timetable will be determined Tuesday.

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,

Ryan Yarbrough picked up a dazzling World Series ring from his time with the Los Angeles Dodgers last season. Then he went out and beat them.

After bouncing back from their worst loss of the year with a 7-3 win over the Dodgers on Sunday night, Yankees manager Aaron Boone put a damper on it. He revealed why the team made a late, on-the-fly bullpen change in the ninth inning.

The New York Yankees got bad news about a star pitcher as one pitcher is seriously injured and placed on the injured list.