The San Diego Chargers know which coach will be tutoring their next ends in 2016.

But just who former Tennessee Titans quarterbacks coach John McNulty will have at his disposal is still very much up in the air.

Via FOX Sports' Alex Marvez:

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Source tells @NFLonFOX that @Chargers have hired John McNulty as new TEs coach. He was @Titans QBs coach. Long-time Whisnhunt connection.

— Alex Marvez (@alexmarvez) February 1, 2016

McNulty has 25 years of coaching experience with recent stops in Tennessee, Arizona, and Tampa Bay. He also has a crucial tie to second-time offensive coordinator Ken Whisenhunt.

He might not have any tight ends to coach , though. Four players saw meaningful snaps at the position in 2015 -- Antonio Gates, Ladarius Green, John Phillips, and David Johnson. All four are free agents this spring.