Two more birdies coming in at 15 and 18 would secure a third green jacket for Lefty .
Mickelson pushed his eagle putt at 13 and would have to settle for a birdie .
Two more birdies coming in at 15 and 18 would secure a third green jacket for Mickelson .
Mickelson pushed his eagle putt at 13 and would have to settle for a birdie .