The Arnold Palmer Invitational concludes Sunday, with the winner taking $4 million from the $20-million, signature-event purse. Here's a look at tee times and pairings for the final round at Bay Hill Club & Lodge in Orlando,

He began the day three shots behind 36-hole leader Shane Lowry, but the Irishman struggled at Bay Hill, opening the door for Morikawa and others to move up the leaderboard. Lowry sat at 8-under at the midway point but dropped two shots on his first two holes — a harbinger of things to come.

The Arnold Palmer Invitational is proving to be a tough test of golf and several big names have already suffered the consequences.