After Johnson and Matteson double-bogeyed the 18th the first time around, Johnson hit a 193-yard shot from a bunker to a foot from the cup. Matteson didn't make his 43-footer to match Johnson's birdie.
It was Johnson's second win of the season and ninth of his career.
Both players hit their second shots into the water on the first playoff hole at the TPC Deere Run in Silvis, Ill. Matteson hit his tee shot into the trees, then hit his layup into the pond short of the green. Johnson hooked his second shot into the pond from a bunker on the left. They each made double-bogey 6.
Johnson birdied three of the last six holes in regulation, taking the lead until Matteson sank a 60-foot eagle putt on the par-5 17th. Matteson made double-bogey on the 15th to hand Johnson the lead, but ran down the long putt while Johnson was on the 18th green to draw even. Johnson shot a bogey-free 6-under-par 65 to finish at 20-under 264. Matteson had a 2-under 69.
Chapman wins Seniors
Roger Chapman joined impressive company Sunday when he shot 4-under 66 on to win the U.S. Senior Open by two strokes at 10 under at Indianwood Country Club in Lake Orion, Mich.
Chapman, an Englishman, had a stunning wire-to-wire win at the Senior PGA Championship in Harbor Springs, Mich.
Jeev Singh wins playoffJeev Milkha Singh beat Francesco Molinari in a playoff to win the Scottish Open and secure a late berth in this week's British Open. Singh and Molinari tied at 17-under 271. Singh won with a 15-foot putt for birdie on the 18th at the Castle Stuart Course. -- AP