The world number one launched one 439 yards down the 16th at Firestone for the PGA Tour's longest drive in four years, watch it here...
WATCH: Dustin Johnson Hits Longest PGA Tour Drive Since 2013
World number one and defending WGC-Bridgestone Invitational winner Dustin Johnson hit the longest drive in four years today on the 16th hole at Firestone.
Disclaimer: The hole is downhill and regularly sees 400+ yard drives, but still, nobody has hit further than that for four years.
Dustin Johnson won the WGC-Bridgestone Invitational last year and has won three out of the last four WGC’s, including the Match Play and Mexico Championship earlier this year.