Disappointing finish for Rory McIlroy on Day 1 at WGC Cadillac

Scott Piercy leads the way while Shane Lowry is also in action

Rory McIlroy

Rory McIlroy, of Northern Ireland, walks off after finishing the first round of the Cadillac Championship golf tournament, Thursday, March 3, 2016, in Doral, Fla. (AP Photo/Wilfredo Lee)

Rory McIlroy had a disappointing finish to his opening round at the WGC Cadillac Championship.

After finding the water with his tee-shot, McIlroy carded a double-bogey five on his final hole that saw him finish with a 1-under par 71 at the Blue Monster Course in Doral.

American Scott Piercy leads the field on 6-under par after carding an opening-round 66.

Shane Lowry was on 1-under par after playing the last hole of his round.

Graeme McDowell finished the day on 2-over.