Mets RHP Robert Gsellman was optioned to Triple-A Las Vegas and RHP Seth Lugo has been activated, according to multiple reports.
RHP Kevin McGowan, who has allowed one run in one and 1/3 innings for the Mets this season, will be the team's 26th man on Sunday,
Gsellman was optioned after allowing six runs in just four innings in the Mets' loss to the Nationals. He allowed nine hits, walked two batters, and struck out one. Gsellman fell to 5-6 with a 5.60 ERA this season for the Mets.
Lugo (shoulder) returns from the disabled list after he was scratched from his start last week with a right shoulder impingement. He is 5-3 with a 4.85 ERA in 12 games for the Mets this season, including 11 starts.