Jay Haas, Mark Hensby on top after first round of Senior Open

Jay Haas and Mark Hensby each shot a 4-under 67 on Thursday to share the first-round lead in the U.S. Senior Open at Saucon Valley Country Club in Bethlehem, Pa.

Haas bettered his age by one stroke in the major tournament. Thursday marked the seventh time he has shot his age or better on PGA Tour Champions circuit.

"I tell people that I still have a real passion to play the game, and I think that's helped me as much as