In showdowns winds are random, pins are random and apparels make things different from a player to another.
Pretty hard to nail a cheater there. I don't see anything suspicious as well, Yannis.
Add 1 more to the "not seeing it" club. It's 100% possible for someone at their level to shoot a score like that in a Master tee showdown. Now, if he posts a - 22 in the final found, I'd raise an eyebrow, but that's about it.
As for his scores, he shot a 28 on PB B9 in ranked mode, so 12 greens and quite windy at his tier. And that's from the tips and without apparel. If he can do that once in a while, he can also shoot - 17 in a showdown from shorter tees, with apparel and completely random conditions. Quite possible he had slow winds on St. Andrews and heavy winds on a course like PGN or WC, combined with a decent wind direction and a good selection of holes (haven't player found 2 yet, so not sure which sets are in it).
Further more, if he plays predominantly coin games, he's used to playing with apparel and therefore even more out of his depth in his ranked rounds, taking shots from completely unfamiliar places.
Anyway, ask yourself 2 things, why (and how) would he "cheat" in round 2 and why the cheat didn't work on a hole or 2? 😉
Can't we just be happy for someone having a good day once every few months. I'm sure he was over the moon about it.
P. S. : A proof someone can have an odd good round... came across a player (in the brackets), who shot 66-68 on almost all his rounds. But posted a 58 in round 1 on Pinehurst, where he posted a 72 a week before. He' s up against me in round 2 and I'll be surprised if he scores anywhere near that...
P. P. S. : But I very much agree with Yiannis about Paul being clueless 🤣🤣🤣