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Pat O'Brien averages 6.74 across 24 rated films as an actor, ahead of Robert Andersen at 6.47.
Dot size shows IMDb votes. Films with fewer than 1,000 votes sit on the baseline.
| The Iron Major | 1943 | · | as Minor Role | as Francis William 'Frank' |
| Marine Raiders | 1944 | · | as Lt. Harrigan | as Maj. Steve Lockhart |
| Riffraff | 1947 | 6.8 | as Co-Pilot | as Dan Hammer |