A one-iron..... have never hit one in my life! Does any player, pros included, even carry one anymore?
At least as of a couple of years ago, there were a few, but mostly the older guys. But anymore, I think it's pretty few--why would you when you can carry an oversized wood? A lot easier to hit.
I read something about Hogan one time about how he was a meticulous planner of his rounds. One year, when the US Open was at Merion, he didn't bring a seven iron. He was asked why, and he said "there are no seven iron shots at Merion." I think that's pretty remarkable.
You’ve likely heard that even God doesn’t carry a one-iron.