The day after the opener I ran into Marv at the airport. He was very gracious and signed autographs and posed for a few photos. He went to sign a guy's hat, and in the process dropped his boarding pass. When the guy picked up Marv's pass for him, he said "thanks for recovering my fumble" without missing a beat.
I was able to get a photo with him and we sat across the aisle from him on the ride to Chicago. He and his wife are very nice, humble, unassuming people.