ORCHARD PARK, N.Y. (AP) — Now that quarterback Josh Allen is under contract, the big question remaining is how long it will be before the Buffalo Bills' rookie first-round draft pick takes over the starting job.

The Bills signed Allen to a four-year contract on Wednesday, a day before they open training camp in the Rochester suburbs.

Allen is the heir-apparent starter after Buffalo traded up five spots to select the Wyoming player with the seventh pick in the draft. He was the third quarterback taken in April, and the first ever selected by Buffalo among the top 10 picks in the draft order.

The 22-year-old still has plenty of work ahead to establish himself, and coach Sean McDermott said in June that he has no intention of rushing the quarterback's development.

Allen spent all but the final week of the Bills spring minicamps serving as the third-string quarterback, while free-agent addition A.J. McCarron and returning backup Nathan Peterman split time with the starters.

At 6-foot-5 and 250 pounds, Allen is a raw but strong-armed and athletic quarterback. He was a two-year starter at Wyoming, where he completed 365 of 649 passes for 5,066 yards with 44 touchdowns and 21 interceptions.

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