Yankees' Luke Weaver expected to be placed on IL with hamstring injury: report

Yankees closer Luke Weaver is expected to be placed on the injured list due to a hamstring injury, according to ESPN's Jeff Passan.

He suffered the injury on Sunday while warming up and wasn't available to pitch against the Los Angeles Dodgers.

Weaver underwent an MRI on Monday and could miss four to six weeks, but the official timetable will be determined on Tuesday, Passan notes.

Yankees manager Aaron Boone was planning on using the right-hander in the ninth inning, but said he felt discomfort while warming up in the bullpen.

While Boone hoped the injury wasn't too serious, it appears New York will be without their closer for for foreseeable future. Weaver has recorded eight saves while pitching to a stellar 1.05 ERA with 24 strikeouts in 25.1 innings.

The Yankees will likely turn back to former closer Devin Williams, who was removed from the role at the end of April. Williams has five saves on the year, but only one (May 27) since blowing a save opportunity on April 25 against the Toronto Blue Jays. The two-time All-Star went 2-0 with a 4.22 ERA over 10.2 IP (12 games) in May and has been even better as of late, owning a 2.70 ERA with nine strikeouts over his last seven games.