They remain under contract, but that doesn't mean they'll remain with their teams.
In a league in which trades are rare, there might be a record number of players on the block this offseason. From disgruntled Cincinnati receiver Chad Johnson, who has been openly lobbying for a trade, to a group of guys who still might believe they can spend their entire careers in one uniform, there's a growing list of high-profile players who could become available as teams start overhauling their rosters.
Everything from team chemistry to the salary cap could be involved in potential decisions to peddle big-name players. But asking prices aren't always met, and that could lead to some surprise cuts.
Here's a look at 10 big names who could be on the trading or chopping block:
Donovan McNabb, Philadelphia Eagles
Reasoning: The Eagles keep saying McNabb is their guy, and maybe that's the truth. But there was a reason why the Eagles drafted Kevin Kolb last year. McNabb's age and history of injuries are concerns. Philadelphia has lots of needs at other positions and McNabb should have substantial market value. Former Philadelphia assistant coaches Brad Childress (Minnesota) and John Harbaugh (Baltimore) are desperate for a solid quarterback and they might be willing to put together offers that would tempt the Eagles.
Jeremy Shockey, New York Giants
Reasoning: Maybe it's not a coincidence that the Giants played their best after Shockey was injured. He and quarterback Eli Manning never have had great chemistry. Winning the Super Bowl gives Manning more clout. That's not to say Manning will try to run Shockey out of town, but the Giants will be more conscious than ever about doing what's best for their quarterback. Shockey kept a low profile during all the Super Bowl festivities, and he might want out. The development of rookie Kevin Boss during the postseason gives the Giants some flexibility at tight end.