Mickelson hit his opening tee shot into rough, bladed his second under the spectator stands and conceded after missing his par putt. On the par-5 second, he was in a greenside bunker in two, but took two shots to get out and gave Scott his 2-footer for birdie.

On the par-3 third, Mickelson's tee shot was short and in a gully. His first chip rolled on the green and off, back nearly to his feet. His next effort went into a bunker, and he again conceded.

The pair halved the fourth hole -- with bogeys -- and Mickelson, who was rested Saturday afternoon in fourballs, bogeyed the fifth to go 4 down.