I read a quote from Spielman that said they decided to release him abruptly because like Jim said the Loadholt deal was higher than they thought but they wanted to give him a fair shot at free agency.Mothman wrote: Undoubtedly...
I also got the impression from at least one report that cutting him wasn't necessarily in the plan but when negotiations with Loadholt took a turn toward the expensive (ie; more than the Vikes expected it to cost them) Winfield became a cap casualty because they didn't want Loadholt to hit the open market.
He's one of my favorites too and I'd love to see him playing for the Vikings again this season. I hope they can work something out.
It seems like the sides weren't very close and rather than eat into the free agency period trying to come to an agreement when they already weren't very close they wanted to give him a shot to find the deal he wanted with some other team.
To me it also seems like they wanted to let the market set his value to avoid overpaying for his services.