I don't run either.

I'm not for the brace unless your Dr or a PT approves but I can understand being afraid to try again. I have numerous and sundry joint problems. I wear a brace in any sport that involve lateral movement, that's martial arts for me, and no other time.

The problem with braces in my totally untrained and devoid of medical background view is that ultimately you could weaken supporting muscles.

So for me it's preventative because if I tear my ACL again my football career is over

My vote would be take it easy, start slow and taper off gradualy build up your distance and confidence. Swimming is also wonderful rehab in my completely non-expert view.