Per Kevin Burkhardt on the SNY broadcast, the Mets have signed Kiko Calero to a minor league contract. Last season, Calero was quietly one of the best relievers in baseball with a 2.29 tERA, putting him in the 1.5-2 WAR range. His stuff isn't overpowering (fastball sits around 88) and there are some durability concerns, but when healthy, Calero's talent is undeniable. He primarily throws a fastball with some cutting action and a slider. With Kelvim Escobar out to start the season, Calero could become the primary setup man. This also marks the second move the Mets have made consistent with my offseason plan!
Update: Per Joel Sherman, Calero will earn $850K if he makes the team and another $650K in potential performance bonuses.
Update #2: Calero allowed just one home run in 60 innings last year -- to Chan Ho Park's daddy, Fernando Tatis.