Stricker closed with a 2-under-par 69. His 72-hole total was 16-under 268.
He stumbled early on the back nine, but recovered long enough to win the first event in the FedEx Cup Playoffs.
"It was hard, but it was a lot of fun," Stricker said after his first win since the 2001 WGC-Accenture Match Play in Australia. "It's been a long time, six years. I was wondering if I was going to do it again today."
Stricker earned a winner’s check of $1,260,000.
Choi shot 1-under 70 Sunday for a final total of 14-under 270, but did not make enough key shots to withstand Stricker's late charge.
Beyonce flaunts bikini body, Blue Ivy in vacation pics
Couple mistakenly served bag of cash at McDonald's drive-thru