The Knicks are adding free agent Dylan Windler, signing the injury-plagued 26-year-old wing to a two-way contract.

The news was first reported by ESPN and confirmed by The Post.

To make room for Windler, the Knicks plan to waive Trevor Keels but retain his G-League rights, The Athletic reported.

The 6-foot-6 Windler was a first-round pick by Cleveland in 2019, but after playing 50 games for the Cavaliers two years ago, he made just three appearances last season, plagued by ankle and hamstring woes.

Windler has played just 982 NBA minutes in 84 games. He seems likely to spend most of the coming campaign with G-League Westchester.

To make room for Windler, the Knicks would have to make another roster move.

The NBA raised the number of two-way spots from two to three for this coming season.

Windler takes Keels’ spot in that allotment, joining Jaylen Martin and Nathan Knight, but all of the Knicks’ slots are spoken for by Jaylen Martin, Nathan Knight and Trevor Keels.

Duane Washington had also been extended a two-way qualifying offer, which would require another cut if he accepts.