According to ESPN News, Chris Schwinden who vacated one of the two roster spots that need to be opened for the promotion of right-handed reliever Elvin Ramirez and activation of catcher Josh Thole from the disabled list.
Schwinden was placed on waivers by the Mets on Thursday, that maneuver would free a 40-man roster spot for Ramirez.
The 25-year-old Schwinden is 0-1 with a 12.46 ERA in 8 2/3 innings at the major league level this season. He has made three appearances (two starts).
The Mets still will need to free a 25-man roster spot for Thole.
Assuming the Mets do not go with three catchers -- which would not seem the likelihood -- Mike Nickeas would appear far more vulnerable than Rob Johnson for a demotion.