https://intermatwrestle.com/articles/3804
Gary Kurdelmeier also put fans in the stands with innovative promotions. For instance, for the 1975 dual meet vs. Oklahoma, he made a deal with the local McDonald's: If the Hawkeyes held the Sooners to fewer than ten points, each fan in attendance would score a free hamburger.
The promotion didn't stop there. For that Iowa vs. Oklahoma dual meet, Kurdelmeier had a 74-foot square mat put down on the floor of the Iowa Field House. "The mammoth mat practically covered the entire basketball floor, and the circle extended beyond the basketball foul lines on each end," according to Steve Hunte, Iowa's 134-pounder at the time.
"Oklahoma was notorious for playing the edge, hence the huge mat. You should've seen the looks on their faces when they came out into the gym and saw that huge mat for the first time … It really got the Iowa crowd excited."
The big mat worked. The dual meet was wrestled in just 56 minutes, with action being stopped only once for going out-of-bounds. The Hawkeyes drubbed the Sooners 34-5. As then-assistant coach J Robinson told Andy Hamilton for The History of Collegiate Wrestling, "It just about broke McDonald's. All of the sudden they had 9,000 people descending on them for a free hamburger."
In the "Ask Dan Gable" column at Iowa Public TV's College Wrestling website, the legendary wrestler/coach weighed in on the big mat: "The matches were quick because of very few whistle stops. No edge-of-the-mat controversial calls. Scared our opponents. Their coach said, 'It was like getting caught in an Iowa cornfield and not being able to find your way out.' Had a few meets, then it was outlawed by the wrestling rules committee. Rule based on inequality, that not everyone could afford to have a mat of that size."