Had to google what you meant by Hale Irwin putt, but presumably you mean missed the ball? I have no clue how you would miss the ball on a putt and I've never seen it happen. If I did I would probably be too taken aback/busy laughing to even think about whether he counted it or not.
I think everyone else was mystified at the time. If you have not actually seen a video then, from memory, his ball was on the edge of the hole and he went to just tap it in. He wasn't concentrating and his putter caught the ground, bounced over the ball, counts as a shot. I think he lost the tournament, The Open, by one shot. Ouch