Rory McIlroy re-united with the 3-iron he threw into lake at Doral . Presented with the club by owner Donald Trump . Repeats mistake with same club on final hole of WGC-Cadillac Championship . Dustin Johnson wins tournament after the 18th absence from PGA Tour .
Rory McIlroy re-united with the 3-iron he threw into lake at Doral . Presented with the club by owner Donald Trump . Repeats mistake with same club on final hole of WGC-Cadillac Championship . Dustin Johnson wins tournament after six-month absence from PGA Tour .