[FloridaMan88]

From the GQ article, sounds like MJ-level competitive drive...

Before COVID-19 sent him back to Dallas, on his last day pre-isolation, Mahomes was in California playing a different backyard course: the notorious par 3 that CBS Sports broadcaster Jim Nantz built behind his house. Earlier in the day, Nantz accompanied Mahomes for most of the 36 holes he'd played on the wave-licked bluffs of California's Monterey Peninsula: 18 at Cypress Point in the morning (where he shot an 81), another 18 at nearby Pebble Beach (where he put up an 83). When Nantz invited Mahomes to swing by for some shots on his half-size replica of Pebble Beach's seventh hole, the young QB jumped at the chance. He was eager to earn a place on Nantz's “Rock of Fame,” which sits near the tee box and lists all those who've successfully nailed a hole in one.

It had been a nasty, rainy day, and it was already getting dark by the time Mahomes started teeing off, so Nantz remembers having to turn on the stadium lights he keeps back there. Though Mahomes nearly aced his first shot—it lipped out on the opposite side of the hole—he says he was nowhere close after that. Even still, he must have taken 40 or so swings, not willing to give up. Nantz told me that he remembers Mahomes being “fired up.”

“His whole countenance changed once he stepped foot on that tee,” Nantz said, his famously buttery voice lending drama to the recollection. “He was sociable. He was who he is. He's just a great guy, convivial and all that, but I also saw him go to a place that I've recognized looking into the helmet a few times. ‘I'm here to do something. I'm here to pull something off. I'm here to make history.’ ”

After a while, it was getting late. Mahomes and Brittany were scheduled to catch a plane back to Dallas the following morning and worried that, with the coronavirus starting to spool out across the country, missing their flight could spell big trouble. It was hard to pull him away, but Brittany eventually succeeded. “I'm going to be back,” he told Nantz on the way out, vowing to hit a hole in one.