Isn't Bentley out for the same reason as well as Holroyd? While I understand the present caution, the sport will cease to exist unless we find a middle ground. We've got three players out with long term concussion issues on top of the usual wear and tear.
On salary cap, I think you can get exemptions for players ruled out for the year, but no idea on the details. I wouldn't want to knee-jerk sign anyone though, and we need a prop far more than a back row.