His tribute of choice: Loud, flashy cleats at Sunday's game against the Detroit Lions, mimicking Sager's taste for bright, unorthodox fashion.
That got the New York Giants receiver fined $18,000 by the NFL, even after he auctioned the shoes for charity. Beckham vented about the fine on Instagram on Wednesday.
The rant showed up in a comment on Washington Redskins receiver DeSean Jackson's post.
Here's the full text of Beckham's comment:
"Don't worry I got fined 18k for Craig Sager cleats that were auction off the cleats to the highest bidder and donating the proceeds to his cancer research. 18k like it's nothin to them, no warning to take them off or anything , noTHING!"
Beckham has a history of wearing flashy cleats. Here are some of his most unusual kicks from over the years.