Phil Mickelson nearly carded the greatest hole in PGA Tour history Friday -- missing a hole in one on a 353-yard Par 4 ... by INCHES!!!!
Lefty was playing in the second round of the CJ Cup in South Korea ... when he stepped up to the tee box on the 14th hole at Nine Bridges -- and nearly did the unthinkable.
With a driver in his hand ... Phil took a violent swing and ripped a golf ball that hit the green on the fly.
It tracked all the way to the hole .