Holland missed the entire 2016 season, undergoing Tommy John surgery. Prior to that he was one of the more dominant closers in the game for the Royals.
In his six year career, Holland has compiled 145 saves in 319.2 innings pitched while striking out 430 and pitching to a 2.42 ERA with a WHIP of 1.12. Of course with coming back from the surgery it is not known what you can fully expect out of Holland.
The Nationals are thought to be interested in Holland’s services along with free agent catcher, Matt Wieters. Washington’s Bryce Harper has lobbied for the Nats to sign both players, something the team has not had much luck with this offseason.
With the Mets needing help in the bullpen, especially toward the backend with the suspension of Jeurys Familia looming, Holland could be quite the pickup. They did attend his showcase session in early November, their interest level though is unknown at this time.