PALM BEACH GARDENS, Fla. -- Lee Trevino had just completed a 64, and he was running hot.

His 8-under-par score could have been better. And he knew it.

"I'm still hot about those two bogeys," Trevino mumbled yesterday after establishing a four-stroke lead at the halfway point of the PGA Seniors Championship.

His mood quickly improved, however, when he began recounting the fastest start of his career: a 29 on the front, 9-under par after 10 holes and 10 under after 12.

"Yeah, after I make eagle on 10 and birdie on 12, I was thinking of the 50s. Just for a minute, until I made that little boo-boo on 13," Trevino said.

He hit a fat shot from a divot there, made bogey from a bunker and, realistically, lost any chance of becoming the first of the over-50 set to break 60 on the senior tour.