Wyndham Clark handled a stressful day at Bay Hill by eliminating as much trouble as possible. Two late birdies as the wind finally waned carried him to a 5-under 67 and a two-shot lead Thursday in the Arnold Palmer Invitational. It was clear from the start Bay Hill was going to be a beast with cold weather and big wind on a course with thick rough and putting surfaces that already had a yellow sheen to them.