In preparation for the ban , Stadler started putting left - handed .
Stadler was one of the few golfers to employ the use of an anchor putter , which the PGA Tour banned on January 1 , 2016 .
In preparation for the ban , one started putting left - handed .
Stadler was one of the few golfers to employ the use of an anchor putter , which the PGA Tour banned on January 1 , 2016 .