(Photo credit: Jeff Lange / USA TODAY NETWORK)

Steve Stricker and South Korea's K.J. Choi posted matching rounds of 8-under 62 to tie for the first-round lead of the Sanford International on Friday in Sioux Falls, S.D.

Stricker and Choi share a one-shot lead after their first day at Minnehaha Country Club. David Toms, Rocco Mediate, Alex Cejka of Germany and Darren Clarke of Northern Ireland are tied at 7-under 63.

Stricker -- the event's defending champion and the runaway leader in the Charles Schwab Cup race -- birdied nine of his first 14 holes before finishing with three pars and a bogey.

"It was disappointing the way I finished, I know that," Stricker said. "I was going well and then just kind of lost all momentum, you know, and that happens at times."

Conversely, Choi began his round par-par-bogey before shifting into high gear. He birdied six of his next eight holes and added three birdies in a row at Nos. 14-16.

Of the four players to shoot 63, only Toms and Cejka stayed bogey-free. Toms opened birdie-birdie and went out in 4-under 30 before adding three birdies on the back nine.

"Birdied the first two holes, that always helps," Toms said. "And I made a couple par saves middle of the round, 9 and 13 I guess, to kind of keep the round going. But I hit a lot of good shots. Made a very cool putt on 18."

Toms wasn't surprised by how many players went low Friday.

"The rain softened things up. We didn't have much wind today at all, which is unusual for here," Toms said. "I think you could tell by the scores."

David Branshaw is alone in seventh after a bogey-free, 6-under 64. West Short Jr., Joe Durant and South Korea's Charlie Wi shot 5-under 65. John Daly and Boo Weekley were part of a large tie at 4-under 66.