Between now and March 5, the first day of the new NFL year and the first day of free agency, plenty can and will change. Teams will attempt to sign some players to long-term deals. Teams will release other players not deemed worthy of their 2010 scheduled base salaries. And teams will slap franchise tags on other players that will restrict their free-agent prospects, disappointing players such as wide receivers Miles Austin, Vincent Jackson and Brandon Marshall. So the class of free agents can look strikingly different from one day to the next. But here's a look at what arguably could be the top five free agents available on March 5.
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