Editor’s note: This is an excerpt from a piece our Andrew Tursky originally wrote for PGATour.com’s Equipment Report. Head over there for the full article.

On Monday at the 2024 PGA Championship at Valhalla Golf Club, Block had a full set of TaylorMade “Proto” irons in the bag.

Block is the first player of many on the PGA TOUR to bag a set of the mysterious “Proto” irons. Rory McIlroy first switched into a “Proto” 4-iron at the Valero Texas Open, and Collin Morikawa followed suit at the 2024 RBC Heritage. Block isn’t using just the 4-iron, though, he’s using a full set to go along with a TaylorMade Stealth UDI driving iron.

Speaking with GolfWRX.com on Monday at the PGA Championship, Block revealed the full backstory.

“I hit a couple super “Proto” irons when I was at the Kingdom (TaylorMade’s fitting facility in Southern California) a couple months ago, and it was a 9-iron that didn’t have any badges or anything on it,” Block said. “I had no idea what it was … It was very similar to what I was using back then, you know, my old MCs, and very similar from the top. I hit it and absolutely loved it. For me to even think about switching irons from the last 11-12 years is crazy.

“I got this set about two weeks ago, and I’m working my way into them. I hit them more solid; it comes off the face more solid. Much higher. I think they’re still slightly too upright for me, so they’re being bent a degree flatter, because they’re going a little too high for me and drawing a little too much. When that starts to happen, I start to drop the club under and compensate too much, so I’m getting them flattened slightly, and I’m going to test them on the range again, and hopefully have them in play on Thursday…

“They go further, and they go higher … that combination is kind of a no-brainer. If I can take a 5-iron from 204 rather than a 4-iron, it’s good on me. It’s going to help me out for sure, especially at a major with the pin locations. Having that height coming in, that descent angle is going to be huge.”

With such new irons in the bag, after using the same irons for over a decade, surely you’d think there will be a bit of a learning curve. Block, however, is finding immediate comfort with the new “Proto” irons.

Head over to PGATour.com for the full article.