He held out of the preseason, seeking a new contract from the Raiders.
The Chicago Bears are expected to pull off a whopper of a trade the likes of which the team hasn't seen in about a decade.
The Raiders exercised their fifth-year option, worth almost $14 million, on Mack.
The Oakland Raiders under Jon Gruden have shown very little interest in mending matters.
It is bad enough for the Raiders that they just lost their best player and if they truly are in cash flow issues, it could be getting better no time soon.
The fifth overall pick in the 2014 draft out of Buffalo, Mack has established himself as one of the best rushing linebackers in the National Football League during the first four seasons of his career. But aside from Trubisky, Mack represents greater value than anyone Chicago has nabbed with its first pick in many, many years. The head coach apparently feels the $20 million or so per season that Mack would command would be better spent if it were spread around to multiple defensive players.
"This is the sucky part of this business. #RaiderNation we feel your pain trust me but we need you next Monday night!"