The Mets recalled Walker from Triple-A Syracuse on Thursday.
The Mets optioned Walker to Triple-A Syracuse on Sunday.
Walker was recalled from Triple-A Syracuse by the Mets on Monday.
Walker was optioned to Triple-A Syracuse by the Mets on Friday, Will Sammon of The Athletic reports.
Walker (oblique) was transferred Thursday from the 15-day injured list to the 60-day injured list, Tim Healey of Newsday reports.
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.
Walker was recalled from Triple-A Syracuse on Tuesday, Anthony DiComo of MLB.com reports.
Walker is up as the 27th man for the Mets in Saturday's game against the Red Sox.
The Mets optioned Walker to Triple-A Syracuse on Monday, Anthony DiComo of MLB.com reports.
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.