SATURDAY, 4:10pm: Major League Baseball will independently review Oliver Perez's medical records, including the MRI he took on Friday, a league official told Andy Martino of the New York Daily News. The official told Martino that the league often does this when an injury needs clarification.
11:09am: Perez was placed on the 15-day disabled list with knee tendinitis today according to SNY's Kevin Burkhardt (via Twitter). No further move will be needed to make room for Niese.
FRIDAY, 9:48pm: If Oliver Perez does not accept a minor league assignment, the Mets may designate a reliever for assignment, according to MLB.com's Anthony DiComo. The organization is hoping that Perez will agree to the demotion by tomorrow when they plan to activate Jon Niese off of the disabled list.
In order to make room on the roster, Elmer Dessens could be DFA'd. The Mets re-signed Dessens to a minor league deal in December and have given him just 4.1 innings of work heading into tonight's game. However, the veteran hurler made his case for staying on with the club tonight by pitching 1.1 scoreless innings to set the table for a Francisco Rodriguez save.
Another possibility for the Mets would be to option Jenrry Mejia to Triple-A, though they may want to keep him on the big league roster.
Perez refused a minor league assignment from the Mets on Monday. The club reportedly asked the lefty at least twice to go to the minors.