"For my wife and three kids to be here is fantastic, and I'm just sorry for them," Montgomerie said. "It was very hot for them to walk around. They had to walk 21 holes today. Eighteen is enough."
David Frost and Woody Austin, making his Champions Tour debut, tied for third at 1 under. Jeff Sluman, Vijay Singh and Marco Dawson tied for fifth at even par.
Bernhard Langer, who was among the leaders for most of the tournament and entered the final day at 4 under, faltered on the back nine. He double bogeyed 16 and finished at 6 over for the day and 2 over for the tournament, tied for ninth.
Sauers' performance was impressive, given his circumstances. He said a reaction to a wrongly prescribed medication several years ago caused Stevens-Johnson syndrome, a disorder that burned the skin on his arms and legs from the inside out. He got out of the hospital in June 2011 and eventually returned to the course.
Sauers hadn't finished higher than 15th in a Champions Tour event this year, and hadn't won an event of any kind since the 2002 Air Canada Championship on the PGA Tour. He has never won a major on the Champions or PGA tours, but he was thankful to be close.
"I'm glad to be able to be here to play with my friends again," he said. "I'm glad to be here and I'm coming back. I feel good about my game, and there's always next week."
Follow Cliff Brunt on Twitter: www.twitter.com/CliffBruntAP.