The Mets optioned Mauricio to Triple-A Syracuse on Tuesday.
The 26-year-old was added to the active roster in late June but will now head back to Syracuse since Jorge Polanco (Achilles/ankle/wrist) was reinstated from the IL. Mauricio has struggled at the plate in 17 big-league games this year, going 9-for-50 (.180) with no walks and a 36 percent strikeout rate.