The Buffalo Bills have opened the 21-day practice window for first-round cornerback Maxwell Hairston , marking a significant step toward his NFL debut after a knee injury sidelined him since training camp.

“The Bills have opened the 21-day practice window for first-round CB Maxwell Hairston, who is on IR,” Ian Rapoport tweeted on Monday.

Buffalo selected Hairston with the 30th overall pick in April's draft. He suffered an LCL sprain on July 29 during training camp and was placed on injured reserve before the season started.

The move gives the Bills three weeks to activate Hairston to the 53-man roster. If they don't add him within 21 days, he'll revert to season-ending IR.

Bills head coach Sean McDermott said Hairston is moving in the right direction , according to The Athlet

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