The Ryan Kalil experiment for the Jets has come to an end.
The Jets announced on Saturday that the center will head to the injured reserve list, ending his season, and perhaps career.
In a corresponding move, the Jets signed offensive lineman Leo Koloamatangi to the team's 53-man roster from their practice squad.
Kalil was already designated as out of the Jets' meeting with the Redskins on Sunday in Week 11. It was going to be his third-straight game missed with a knee injury. Jets head coach Adam Gase commented on Kalil's status on Friday, but did not indicate such a move was en route.
"He didn't have a setback," Gase said. "We're just trying to figure out what's going on with him and we just thought that was the best thing to do."
The 34-year-old signed with the Jets on Aug. 2, but was relatively ineffective this season. Football analytics outlet Pro Football Focus graded Kalil's efforts poorly this season, handing him an overall grade of only 46.7.
Jonotthan Harrison was replaced by Kalil on the Jets' starting offensive line upon Kalil signing with Gang Green this offseason. Over the past two games, Harrison has replaced the injured Kalil, and per PFF, has played better when given those opportunities. PFF graded Harrison a 58.8 overall so far in 2019. In comparison to the rest of the NFL, Harrison is graded as PFF's 23rd best center in the league while Kalil clocked in at No. 33.
Kalil was a second-round pick of the Panthers in 2007 and spent his entire career there, earning All-Pro honors, before leaving retirement to join the Jets.
Koloamatangi, a Hawaii product, has only previously spent time on the Lions' practice squad after signing with Detroit following the 2017 NFL draft.