LAKE PARK, FLORIDA – JumboMax®, the industry leader in grip fitting, today announced that major champion, former World No. 1, and 13-time PGA Tour winner Jason Day has officially joined Team JumboMax.
Day opened the 2026 PGA Tour season with a T2 finish at The American Express, leading the field in Strokes Gained Total. The performance marked a strong early result following his switch to JumboMax grips.
Day’s first experience with JumboMax came in a fitting with Avoda Golf, where he tested JumboMax’s wide range of grip sizes for the first time.
“I was curious about JumboMax, but I thought JumboMax only made massive grips like the ones Bryson uses,” Day said. “I didn’t realize how many different grip sizes, weights, and shapes JumboMax has created to help golfers play better. The fitting showed me that it’s not about playing a bigger grip. It’s about playing a better grip for your game.”
In Day’s testing, JumboMax’s JMX Zen Lite, which uses a pro-preferred rubber surface, stood out for its control and feel. Day saw the best performance and consistency with JumboMax’s Standard Jumbo (+1/8) size, which is considerably larger than the grips he was previously using but nowhere near as JumboMax’s largest sizes.
JMX Zen Lite. Updated for 2026.
JMX Zen Lite leverages an UltraLite core to offset the grip weight increase that typically occurs as grip size is increased. The lightweight core construction allows golfers to increase grip size without meaningfully altering swing weight or timing. The result is improved control and consistency without introducing other variables.
For 2026, JMX Zen Lite has been improved with a thicker outer layer and a tackier surface that delivers a firm, consistent feel and maximum performance in wet or humid conditions. These updates preserve the grip’s lightweight construction while enhancing durability and traction.
Joining The Team
Day joins a Team JumboMax staff that includes fellow major champions Bryson DeChambeau, Sergio Garcia, and Retief Goosen.
Day will use JumboMax grips on all of his full swing clubs and work closely with the brand on product testing and feedback as JumboMax continues to bring new technologies to its products and the process of grip fitting.
About JumboMax
JumboMax Grips is a leader in golf grip innovation, offering the industry’s widest range of grip sizes, weights, and shapes to help golfers achieve superior performance and comfort. Trusted by amateurs and professionals alike, JumboMax grips are engineered to maximize control, consistency, and power.
JumboMax Grips are proudly used by Bryson DeChambeau, Sergio Garcia, Jason Day, Retief Goosen, Ian Gilligan, Martin Borgmeier, Kelly Rudney, Justin James, Branden Shattuck, Simon Dyson, and many other tour players and long drivers around the world.
For more information on JumboMax, visit jumbomax.com. For media inquiries, contact Zak Kozuchowski of Rooted Solutions at zak@rootedsolutions.co or call (804) 426-5108.