Walker to Bears

Interesting trade of disgruntled DT Darwin Walker from the Bills to the Bears. Does the Bills’ trade condition with the Eagles about Walker reporting/playing for camp or the Bills’ get a draft pick back from the Eagles’ convey to the Bears now? What pick did the Bills get in return and is it more or less than what was traded for the Eagles? With the Bears dearth of d-tackles, it would seem that Walker has a little more leverage in his contract negotiations. Finally, interesting round robin that has left the Eagles with former Bears tackle Ian Scott, and the Bears filling the hole left by Scott’s departure (and that of Tank Johnson) trading for Walker, who became expendable when Scott and Montae Reagor were acquired.