I have to admit I like the sound of this one:
At the very least, a 48- or 72-hour window would give teams a chance to make their own free agents a newly competitive offer if their roster outlook indeed has changed since February. I'm guessing the NFLPA wouldn't offer strong opposition; players could simply refuse their team's offer and wait for the full market to open.
This idea makes a lot more sense -- and would be much more preferable for the players -- than the "right of first refusal" proposal. The window would give teams a chance to make "competitive offers" to free agents they intend to retain. Easing into the free agency and trade period is the best way to begin what will be an extremely hectic period, possibly the busiest in league history.
Or its the ESPN guy commenting...either way I would agree to this method to kicking off free agency.