NEW YORK (CBSNewYork) — New York Knicks guard J.R. Smith has been fined $50,000 for “recurring instances of unsportsmanlike conduct,” the NBA announced Wednesday.

Smith was caught untying Dallas forward Shawn Marion’s sneaker during a Mavericks free-throw attempt on Sunday.

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The NBA said Smith received a warning from the league Tuesday and then “attempted to repeat the action” against the Pistons.

“I wasn’t really too concerned about (getting fined),” Smith said after the Knicks’ 89-85 win over Detroit, according to the New York Post.

Before Tuesday’s game, head coach Mike Woodson said he would talk to Smith about the sneaker shenanigans.

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“His focus should be on just playing basketball,” Woodson said. “That’s what it’s about. Those are things you just don’t do. You think you’ve seen it all and something creeps in.”

The 28-year-old Smith has been disciplined by the league in the past for no-nos ranging from ill-advised tweets to drug policy violations.

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