Jordan Spieth, using new Titleist irons, cards six birdies Thursday at 2021 British Open

The new Titleist T100 irons are not yet available at retail, but Jordan Spieth put a set in play to climb the leaderboard at St. George’s.

Jordan Spieth, who shot 65 Thursday at Royal St. George’s Golf Club, went on a four-birdie run on the front nine to work his way up the leaderboard at the 2021 British Open. His putting was excellent, as it has been for much of 2021, but those birdie putts were set up by several outstanding shots the Texan hits with his new Titleist T100 irons.

Typically, in the days leading up to a major championship, golfers shy away from making substantive equipment changes. However, Spieth worked at home last week with Titleist’s director of player promotions, J.J. Van Wezenbeeck, and after thoroughly testing the yet-to-be-released-at-retail irons, decided to put them in his bag. He is using the T100 4-iron through 9-iron, and the clubs are fitted with the same Project X 6.5 shafts that Spieth had in his previous set of Titleist irons.

Titleist T100 iron topline
Titleist T100 irons have a thin topline, minimal offset and classic look at address. (David Dusek/Golfweek)

Titleist took the new T100 irons to the PGA Tour for the first time at the Travelers Championship in June, but Spieth saw them at a Titleist photo shoot in Dallas before the start of the AT&T Byron Nelson Championship. Van Wezenbeeck said Spieth immediately liked the looks and feel of the new irons and especially liked the way the clubs work through the turf.

Interestingly, this is not the first time Spieth has changed irons before starting a British Open. In 2019, on the eve of the British Open at Royal Portrush, he switched into Titleist’s first generation of the T100 irons.

In addition to adding the T100s this week, Spieth, who typically carries either a hybrid or a hollow-bodied driving iron, tested a Titleist T200 3-iron and 4-iron.

Titleist has not officially commented on the T100 or the T200 irons, or said when they would be available at retail. Still, if history is a guide, recreational golfers will see them in pro shops starting in September or October.