Shane Lowry takes lead at the Arnold Palmer Invitational

Seamus Power finished his round even after a round of 72 with Rory McIlroy finishing on one over 73.

LEADER: Shane Lowry is outright leader at the Arnold Palmer Invitational at Bay Hill after his round of five under 66. Pic:  Brennan Asplen/Getty Images

Shane Lowry closed out the first day of the Arnold Palmer Invitational with a one-shot lead at Bay Hill, building on his momentum from last week's Cognizant Classic.

The Irishman was in contention to record his first victory at a regular PGA Tour event at Palm Beach Gardens, but came unstuck on the final day.