Ernie Els led a star lineup of Callaway staff players to switch to the brand new FT Optiforce driver at the Canadian Open last week.
Just four weeks removed since its inauguration on Tour, FT Optiforce is four-for-four as Callaway's No.1 driver at PGA Tour events.
Four-time major champion Els joined the likes of former Masters champion Trevor Immelman, former US Open champion Jim Furyk and rising American star Patrick Reed.
Els played a 9.5-degree 440cc model and averaged a staggering 301 yards average for the week at Glen Abbey GC - some 13 yards longer than his season average on the PGA Tour.
Els said: "When I put this new driver in the bag for the first time at the Canadian Open my distance off the tee jumped to 301 yards, an increase of 13 yards on my season average.
"That's a significant difference. Obviously distance is important, but I also like the way this club sits behind the ball and the head size at 440cc looks just right to my eye. So it scores on looks and on performance; you really can't ask for more than that."
Furyk also moved into a 9.5-degree 440cc model with a Fukikura Speeder VC 6.2x shaft that’s tipped 1”, and a finished length of 44 ½”.
Reed, who gained nearly 30 yards of distance gains with the FT Optiforce driver at the John Deere Classic recently, has now posted three top-10 finishes in his last six starts and has now earned back-to-back top-10s since he put the new driver in his bag.
Click here to learn more about the Callaway FT Optiforce driver