Memorial Tournament 2017: Jason Dufner, David Lingmerth Share Round 1 Lead

David Lingmerth and Jason Dufner both stood at the 18th tee at eight under and looking at potentially sitting alone atop the Memorial leaderboard. Both bogeyed.

Luckily, no one else was within a stroke of them and they will walk into Round 2 with a share of the lead after shooting matching seven-under 65s. Daniel Summerhays and Jordan Spieth sit one stroke behind at six under. Justin Thomas, Lucas Glover and Sam Saunders are all at five under and in a tie for fifth place.

Dufner, who was cut at last week's Dean & Deluca Invitational, played a nearly flawless round of golf until he hit the final tee. He carded six birdies with an eagle on his first 17 holes, hitting all but one of his greens…