Marrero elected free agency Sunday.
Marrero has gone 7-for-24 with four walks, six runs, two RBI and two stolen bases in eight games for Triple-A Syracuse since being outrighted off the Mets' 40-man roster Sept. 16.
The Mets designated Marrero for assignment Monday.
The Mets selected Marrero's contract from Triple-A Syracuse on Thursday, Anthony DiComo of MLB.com reports.
Marrero was outrighted to Triple-A Syracuse on Sunday.
Marrero was designated for assignment by the Mets on Friday, Mike Puma of the New York Post reports.
Marrero was recalled from Triple-A Syracuse on Monday, Anthony DiComo of MLB.com reports.
Marrero was outrighted to Triple-A Jacksonville on Thursday, Jordan McPherson of the Miami Herald reports.
Marrero had his contract selected by the Marlins on Friday.