The LeSean McCoy trade to the Buffalo Bills came together very quickly. The trade was one of the biggest in the NFL in recent history.

The trade took just 30 minutes to complete after the Bills were "stunned" to learn that the Philadelphia Eagles were interested in trading McCoy.

"The trade for LeSean happened really quick," Ryan said at the NFL owners meetings. "We were all sitting there. We were having organizational meetings. ... And all of the sudden we get this call from Philadelphia and I think that was when the trade started. Probably 30 minutes later, the trade was done."

The Eagles called the Bills about McCoy being on the market, which surprised the Bills.

"We were just kind of, like, stunned there for a little bit," Ryan said. "We're like, 'Really? Wow.' All right, so let's just take it from there. Obviously we were interested and then the trade came down. We knew it wasn't going to be cheap by any stretch. And losing a player like Kiko Alonso is obviously a steep price, but we felt really good about it."

Charles Clay has signed a five-year, $38 million contract with the Buffalo Bills.

The Miami Dolphins will have five days to match the offer.

The deal includes $20 million in guaranteed money.

The Dolphins are unlikely to match the offer as they've already signed Jordan Cameron at tight end this offseason.

Percy Harvin will sign with the Buffalo Bills on a one-year deal.

Harvin was released this week by the New York Jets.

Harvin, 26, once regarded as a rising star in the NFL, was looking for his fourth team in four years. 

Harvin missed most of the 2013 season with a hip injury, but he returned for the Super Bowl and contributed to the win by scoring on a kickoff return.

C.J. Spiller has agreed to sign with the New Orleans Saints.

Spiller joins a backfield that includes Mark Ingram and Khiry Robinson.

Spiller was the ninth overall pick in the 2010 NFL Draft.

Spiller is coming off two injury-hampered seasons with the Buffalo Bills.

The Buffalo Bills have acquired Matt Cassel from the Minnesota Vikings.

Cassel had a 65.8 passer rating in three games last season with the Vikings.

Cassel has been a part-time starter since 2011 after playing in 46 games from 2008 until 2010 with the New England Patriots and Kansas City Chiefs.

The Philadelphia Eagles could have a need at running back with their trade of LeSean McCoy to the Buffalo Bills.

The trade effectively ended the tenure of C.J. Spiller with the Bills, but it could create an opportunity for him to join the Eagles.

"I'm pretty sure that Chip (Kelly) has my agent's phone number so I'm pretty sure we might have to make a call over there," he said.

"I've never been in that type of system before," referring to the Eagles' hyped offensive attack, "but I don't think I'd have any problem adjusting to it."

The Philadelphia Eagles have agreed to trade LeSean McCoy to the Buffalo Bills.

The Bills will send Kiko Alonso to the Eagles in return. Alonso played at Oregon for Chip Kelly.

Drafted in the second round of the 2009 draft out of Pittsburgh, McCoy has spent his entire six-season career in Philadelphia.

McCoy had one of the largest contracts in the NFL at running back.