Landry Shamet won the biggest Knicks roster battle.

He earned the last roster spot, as the Knicks cut down on Saturday ahead of the 5 p.m. deadline.

The most notable of the cuts was Garrison Mathews, who was battling with Shamet for that last roster spot. It went from a three-player battle to a two-player battle when Malcolm Brogdon surprisingly retired on Wednesday. Brogdon was expected to make the roster and have a significant role as the team’s backup point guard behind Jalen Brunson, The Post’s Stefan Bondy previously reported , but his sudden decision paved the way for Shamet to return for a second season with the Knicks. 3

Mathews did not play in Friday’s 113-108 win over the Hornets at Madison Square Garden in the preseason finale. Shamet played 20 minutes and finished wi

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