What happened: O'Neill signed as an undrafted free agent on May 12 after playing at Rutgers. He forced an incompletion in the preseason opener and returned an interception for a touchdown during an August practice.

Why it matters: His rise adds a rookie option to an edge group that presented one of the roster's tightest competitions. It also validates the front office's post-draft push to secure his signing.

What to watch: O'Neill's regular-season role and place in the edge rotation will show how quickly he can earn defensive snaps.