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Report: Buffalo Bills RB LeSean McCoy may not return until midseason

It was fair to question the Buffalo Bills' trade for LeSean McCoy in the moment this past March.

Now? It looks worse with each passing week. McCoy suffered a setback in his recovery from an Aug. 18 hamstring injury, as an MRI revealed a new tear, according to Fox Sports columnist Mike Garafolo.

McCoy addressed the setback suffered during practice on Sept. 24 for the first time on Friday.

"One thing I just promised myself is I can't go out there if I'm not 100 percent," McCoy said. "Whatever it is, I'm rushing to get back, but I'm not playing until I'm 100 percent."

He attempted to play through the pain in Week 3, but managed just 16 yards on 11 carries against a Miami Dolphins defense that gave up 166 yards and a touchdown on 29 carries to New York Jets running back Chris Ivory on Sunday. McCoy has rushed for 146 yards on 43 carries and has not scored on the ground this season. Although, he does have a touchdown and another 83 yards on seven catches in the passing game.

If he insists on a full recovery before returning to the field, it could be Week 8 before the Bills see Murray again. Meanwhile, the Bills struggled to gain yardage on the ground in a 24-10 loss to the New York Giants on Sunday. Rookie running back Karlos Williams, the team's fifth-round pick this past May, rushed for 40 yards on 18 carries, although he added 30 yards and a score on three catches in McCoy's absence.

The Bills dealt promising young linebacker Kiko Alonso to the Philadelphia Eagles for the three-time Pro Bowl running back, and then handed McCoy a five-year, $40 million contract extension that guarantees him $16 million this season — the same figure former Buffalo back C.J. Spiller is slated to make through 2019. Granted, Alonso has also suffered a setback, but he's due less than $2 million through next season.

McCoy's arrival spelled the end of longtime Bills running back Fred Jackson, whose $2.5 million salary was cut from Buffalo's payroll during the preseason. McCoy is still just 27 years old and just two years removed from leading the NFL in rushing yards (1,607) and yards from scrimmage (2,146) for the Eagles. Even if he returns to form, he still won't be worth the $26.5 million he's guaranteed over the course of his contract.

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Ben Rohrbach

is a contributor for Ball Don't Lie and Shutdown Corner on Yahoo Sports. Have a tip? Email him at rohrbach_ben@yahoo.com or follow him on Twitter!