Schefter mentions that the Rams were prepared to sign Mack to an extension and then traded him after in 2019 because they couldn’t afford to keep him beyond the 2018 season.
The Rams reportedly offered the Raiders this deal after they signed DT Aaron Donald to a then-record extension, so there was obviously no way they could fit both Donald and Mack into their salary cap.
Beyond that the fact that the Bears simply offered the most in return for Mack, one report from last week mentioned that the Raiders were concerned that the Rams’ picks were going to be later in the team, seeing as they’re consider a Super Bowl contender.
Mack, 27, is a former first-round pick of the Raiders back in 2014. Mack played out the final year of his four-year, $18,677,002, but the Raiders picked up his fifth-year option last April.
The Raiders traded Mack to the Bears coming out of the preseason in a deal that included two first-round picks. Mack signed a six-year, $141 million extension that includes $90 million guaranteed and keeps him under team control through the 2024 season.
In 2018, Mack has appeared in one game for the Bears and recorded three tackles, one sack, an interception returned for a touchdown, a forced fumble and a pass defense.