NAPLES, Fla. (AP) -- Colin Montgomerie had five birdies in an eight-hole stretch on the back nine Friday, shooting a 6-under 66 for a one-shot lead after one round of the Champions Tour's ACE Group Classic.
Montgomerie is followed by Tommy Armour III, who shot a 67 at TwinEagles Golf Club. Defending champion Kirk Triplett and Lee Janzen are at 68.
Montgomerie began his day with a 40-foot birdie putt. On the back nine, he birdied Nos. 10, 12, 13, 16 and 17.
Armour had four putts of more than 12 feet, including a 40-footer on No. 6 for one of his six birdies. He had a bogey on No. 14. Armour tied for sixth last week at the Allianz Championship in Boca Raton, Florida.
Paul Goydos, last week's winner, was three shots back. Bernhard Langer, who had five victories last season, is five behind.