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With promising second-year running back Karlos Williams facing a four-game suspension to start the 2016 season, it wasn't surprising to see the Buffalo Bills wrap up veteran back Reggie Bush on Monday.

The Bills signed the 10-year vet to a one-year deal, per ESPN.com's Mike Rodak.

The Bills and Bush had been flirting for several weeks, and the move makes a ton of sense. That said, there's a good chance the 31-year-old only contributes sparingly on offense. Even when you take away Williams, Buffalo has a crowded backfield with veterans LeSean McCoy and Mike Gillislee teaming up with Bush and rookie fifth-round pick Jonathan Williams.

Bush suffered a torn MCL midway through the 2015 season, leaving his career in peril. It's tough for a 30-something-year-old back to come back from an injury like that, but Bush's versatility is a major asset. There might not be a lot of room for him as a prototypical runner within a backfield that led the league in rushing last season, especially if the 28-year-old McCoy can stay healthy and Williams can come back strong after his suspension. But Bush can be a solid receiving threat and return man.

Quarterback Tyrod Taylor could use Bush, who has 470 career receptions, as a safety valve in the passing game. Vic Carucci of the Buffalo News reported Monday that Buffalo general manager Doug Whaley expects Bush to work mainly as a returner.

That could be interesting, because Bush has returned just eight punts and zero kickoffs since leaving the New Orleans Saints in 2011.