"So a lot of good golf, probably only two bad shots and everything else was good or really good."
Blake closed with a 68. He needed a birdie on the par-4 18th to force a playoff, but hit a tree with his drive and bogeyed the hole. Mark Wiebe also shot 68 to finish third at 10 under.
"Probably the rhythm that I was in wasn't very good because I was just making pars; Bernhard was making all the birdies," Blake said. "You just feel like you have to be more aggressive. But sometimes being aggressive doesn't always work out. Trying to be too aggressive on 18 kind of hurt me."
Langer's last victory came at the 3M Championship in Minnesota, in which he rallied from six strokes down with a 10-under 62 on the final day.
Langer took a 69-point lead over Tom Lehman in the points race for a $1 million annuity. Lehman skipped the tournament.
In Las Vegas, former UNLV player Ryan Moore won the Justin Timberlake Shriners Hospitals for Children Open for his second PGA Tour title, birdieing the 16th hole to take the outright lead and finishing with a 5-under 66 for a one-stroke victory over Brendon de Jonge.
Tied with de Jonge and Jonas Blixt after the third round, Moore finished at 24-under 260 at TPC Summerlin. The Las Vegas resident earned $810,000 in the Fall Series opener.
De Jonge shot a 67. Blixt had a 70 to finish third at 20 under. Former BYU golfer Daniel Summerhays finished tied for 36th place at 7-under.