The Chicago Bears have agreed to acquire Khalil Mack from the Oakland Raiders.

The details of the deal are still being finalized but the Bears will send at least two first round picks.

Other teams made enticing offers of multiple picks, but the Bears were willing to offer the most.

Oakland exercised the fifth-year option on Mack's contract last summer, worth $13.846 million. If he had played under those terms this season, the Raiders could have used a franchise tag on Mack in 2019, barring an impasse.