Palm Beach Gardens, Fla. ? Todd Hamilton played well enough to take the lead in the Honda Classic. Carl Pettersson made sure it was a big margin.

Trailing by four shots at one point Saturday, Hamilton walked off Mirasol with a four-stroke lead after making a birdie on the final hole for a 4-under 68.

He owes much of that lead to Pettersson, who lost the lead and lost control with a five-putt from 40 feet on the 16th hole that sent him to a 76, five shots behind.

“Just a mental block,” Pettersson said. “I’ll try to forget about it and play well tomorrow.”

Hamilton was at 14-under 202 and will play in the final group with Fredrik Jacobson of Sweden, who had a 70.

Hamilton, an All-American at Oklahoma in the 1980s, had played only a dozen PGA Tour events until he finally got his card at Q-school last year.

Chris Riley, who has not made a bogey in his last 43 holes on the Sunrise course, holed a five-foot par putt on the final hole for a 68 that also left him five shots behind.