This can't be the whole story. A 3rd and Joe Thomas would be reasonable.
This just doesn't make any sense unless they knew he would not resign and they wanted to get something in return.
Mike Reiss @MikeReiss
Jamie Collins scheduled for unrestricted free agency after the season. Negotiations had not progressed. Adds context to trade.
In a surprising move, the winless Browns are buying right before the trade deadline.
Cleveland has acquired linebacker Jamie Collins from the New England Patriots in exchange for a third-round pick, NFL Network Insider Ian Rapoport confirmed. ESPN first reported the news.
Around the NFL will have more info on this story shortly.
That seems a bit rash.