The Mets placed Walker on the 15-day injured list Monday, retroactive to Aug. 13, with a right oblique strain, Tim Britton of The Athletic reports.

EDGE Analysis

Walker gave up two solo homers while recording only two outs in his last appearance Saturday versus Atlanta as his season ERA climbed to 8.10. He'll be sidelined for at least the next couple of weeks.

Walker was recalled from Triple-A Syracuse on Tuesday, Anthony DiComo of MLB.com reports.

EDGE Analysis

The left-hander has been in the minors for the past five weeks but will rejoin the Mets on Tuesday after the organization traded away some bullpen pieces at the deadline. Walker has given up five earned runs with a 6:6 K:BB over 6.2 frames in his first taste of the big leagues this season.

The Mets optioned Walker to Triple-A Syracuse on Sunday.

EDGE Analysis

Walker was up with the Mets for just one day after he was designated as the 27th man for Saturday's pseudo doubleheader with the Red Sox, which came about after Friday's series opener was suspended due to inclement weather. He ended up pitching in the second game of the day, recording two outs while allowing one hit.

Walker is up as the 27th man for the Mets in Saturday's game against the Red Sox.

EDGE Analysis

Walker will be available out of the bullpen in the nightcap versus Boston. He's allowed six runs -- five earned -- in just six innings of work this season at the major-league level.

The Mets optioned Walker to Triple-A Syracuse on Monday, Anthony DiComo of MLB.com reports.

EDGE Analysis

Walker has been stellar in Triple-A but has yet to translate his success into the majors. He holds a 7.50 ERA and 2.00 WHIP through seven appearances out of the bullpen this season and will now head back to Syracuse in order to return to form. T.J. McFarland was selected from Triple-A in a corresponding move to take Walker's place.

Walker (leg) made two relief appearances during the Mets' series in Philadelphia over the weekend, giving up four earned runs on two hits and three walks while recording just one out.

EDGE Analysis

Before appearing in games Friday and Sunday, Walker had been day-to-day after exiting a relief outing Wednesday against the Astros when he took a comebacker off the leg. Walker had maintained a tidy 1.59 ERA through his first five appearances with the Mets, but he's now sitting on a 7.50 ERA after struggling mightily over the weekend.

Walker was removed from Wednesday's game against the Astros due to an apparent left leg injury, Anthony DiComo of MLB.com reports.

EDGE Analysis

Walker was struck by a Jeremy Pena comebacker while making a relief appearance in the bottom of the seventh inning Wednesday afternoon at Minute Maid Park. He had a noticeable limp as he made his way into the Mets' dugout but ultimately walked off under his own power. Consider him day-to-day for now.

Walker was called up by the Mets on Saturday, Bob Nightengale of USA Today reports.

EDGE Analysis

Walker has spent two brief stints in the big-league bullpen, throwing a scoreless inning with a pair of walks against the Rays in mid-May in his lone appearance. He owns a 1.45 ERA in 18.2 innings of relief for Triple-A Syracuse. He'll take the roster spot which had belonged to Zack Muckenhirn, who was optioned to Syracuse in a corresponding move.