DEC. 22: Heyman tweets the exact breakdown of Hart’s incentives. He will earn $250K for reaching 350, 375, 400 and 425 plate appearances. Reaching 450, 475, 500, 525 and 550 will each net Hart $300K.

DEC. 19, 12:59pm: Hart will earn $2.5MM in base salary and can double it with another $2.5MM in incentives, according to Jon Heyman of CBSSports.com (via Twitter).

12:55pm: The Pirates announced that they have signed free agent Corey Hart.

Hart could serve as a platoon partner with Pedro Alvarez to help make up for his shortcomings against lefties. After missing the entire 2013 season due to knee surgery, Hart was signed by the Mariners around this time last year. The veteran made 55 starts as a designated hitter while also making seven appearances in right field, two at first base and one in left field. All in all, he posted a .203/.271/.319 slash line in 255 plate appearances. Prior to his lost 2013 season, Hart owned a career .276/.334/.491 slash line.

To make room on the 40-man roster for Hart, the Pirates have designated right-handed pitcher Preston Guilmet for assignment. To keep up with his status and everyone else in DFA limbo, check out MLBTR’s DFA Tracker.