Emiliano Grillo wins Charles Schwab Challenge in dramatic fashion
As third-round co-leader Harry Hall fell out of contention, Emiliano Grillo rose to claim his second PGA tour title.
But the 30-year-old hit a double-bogey on the last hole, providing an opening for Schenk to come back into contention, seeking to win his first PGA Tour title.
Grillo hit his drive into a small stream on the final hole which took the ball back 150 yards before stopping against a rock.
He decided to take a penalty stroke and landed a two-putt from 20 yards to tie with Schenk.
Schenk made par on the final hole while English PGA Tour rookie Harry Hall needed a par on the final hole to compete in the playoff.
Hall hit a bogey on the last hole after landing his drive into the water and finished tied in third with world number one American Scott Scheffler on 7-under.
Grillo struck a five-foot birdie putt to claim the title on the second playoff hole to get his first tour win in more than seven years, finishing the tournament on eight-under with 68 on his final day.
"Obviously it's great," the Argentine told pgatour.com.
"It made everything worth it. The playing, all the hours practicing, the effort from my family. It makes you think when you started playing all the emotions come through your heaer. It's been tough, but it's worth every second."
Grillo's last win was in Napa in 2015 and has had four top 10 finishes this season.
American Adam Schenk finished second place for the second time this season and is still pushing for his first tour win.
Hall, 25, was leading after the first and second day but failed to hang on to the lead with two birdies and five bogeys on Sunday.
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