Manager Terry Collins addressed the team after Sunday's loss but rejects a suggestion that the Mets are at a "critical" stretch of the season.
Jonathon Niese, despite lasting a season-low 4 2/3 innings in a 9-1 loss to Pittsburgh, insisted his recent difficulties are not health-related.
The Mets sent third-string catcher Johnny Monell to Triple-A Las Vegas and called up infielder Danny Muno.
The New York Mets, without Lucas Duda and Juan Lagares, were swept in Pittsburgh for the first time in six years with a 9-1 loss Sunday.
Liriano strikes out 12, Pirates sweep Mets
Sunday's New York Mets Morning Briefing goes back over Matt Harvey's rough outing and looks at David Wright's injury setback.
Manager Terry Collins did not downplay a psychological impact to the Mets from learning this weekend that David Wright had suffered a setback.
New York Mets second baseman Dilson Herrera is not returning from the disabled list with a fractured right middle finger any time soon.
Ruben Tejada will get at least a few days to audition as the New York Mets' third baseman.
Dillon Gee will be part of a six-man rotation with the New York Mets, but not quite yet.
Here are the lineups for Sunday's 1:35 p.m. ET series finale between the New York Mets and Pittsburgh Pirates at PNC Park.
The New York Mets will be without two more of their major pieces in Sunday's series finale against the Pittsburgh Pirates.
A look at the Mets' minor-league results.
New York Mets pitcher Matt Harvey allowed a career-high seven runs in a career-low four innings.
With Eric Campbell in a slump and David Wright on the disabled list, Ruben Tejada will get a chance to start at third base for the New York Mets.
Mets starter Matt Harvey surrendered a career-high seven runs in a career-low four innings.
Burnett sparkles as Pirates hand Mets, Harvey 8-2 loss
the New York Mets' No. 1 catcher is expected to begin a minor-league rehab assignment during the middle of next week.
Nieuwenhuis, 3 for 38 on the season, was designated for assignment on Tuesday.
Mets captain David Wright's lower-back discomfort has resurfaced, indefinitely delaying his return from the disabled list.
The manager admits it will take a "sell job" to Matt Harvey and others.
Matt Harvey will put his streak of 16 scoreless innings on the line at Pittsburgh in a 4:05 start.
Mets vs Phillies
Citi Field - Mon 5/25