Cowboys can’t be cavalier about replacing backup QB Cooper Rush

After spending most of the last eight seasons with the Cowboys, quarterback Cooper Rush recently signed to back up Lamar Jackson in Baltimore. It’s a loss that Dallas shouldn’t take for granted given the significant role that Rush has played, and the likelihood that whoever takes over as QB2 will need to be ready to win some games.

Many have declared indifference to Rush’s departure. It generally comes in two flavors; either you don’t think Rush was that good or you feel that the Cowboys’ season would be over regardless of who the backup QB is. The first line of reasoning is debatable, and the second is even easier to debunk.

There are legitimate complaints about Rush’s overall skill set. He…