Michael Brennan pulls back curtain on Titleist's secret prototype 3-wood

After securing his third career victory at the Baycurrent Classic in Japan, Michael Brennan has provided insights into one of Titleist’s most mysterious prototype clubs. Brennan’s performance was highlighted by exceptional accuracy off the tee, missing only five fairways throughout the entire week. Given that the Yokohama Country Club measures 7,322 yards, Brennan frequently relied on the Titleist GTS 3W Prototype fairway wood. While first spotted at the Texas Children’s Houston Open in March, the club remains shrouded in mystery, even after being tested by pros like Justin Thomas, Cameron Young, and Robert MacIntyre. Brennan, who put the club in his bag at the Colonial, praised its spin consistency, noting that off-center strikes—whether off the toe or the heel—result in predictable outcomes. Unlike the retail GTS2 and GTS3 models which feature adjustable heel and toe weights, the GTS 3W prototype is distinguished by a single sole weight located in the center. The club also sports a larger, flatter profile. Brennan added that the club promotes a slight right-bias, providing him the confidence to swing hard without fearing a left-sided miss. It is expected that the club will remain a Tour-only prototype until the next Titleist product cycle.