It has to be mighty tempting for Belichick to think about putting the balance of Welker’s $9.515 million ($559,706 each week) back onto the team’s approximately $8 million remaining in cap space. With that kind of savings, Belichick might not even want that high of a pick in return. The problem is, there really are only four teams that have the cap space to think about such a trade: the Titans, Chiefs, Jaguars, and Eagles. And they’d probably like to have some knowledge that Welker would be open to a contract extension, and wouldn’t just leave in free agency (perhaps a conditional pick).
https://www.patspropaganda.com/welker-belichick-patriots-trade/