Father-of-three Zach Johnson refused to get too carried away after winning the 144th British Open in a four-hole playoff with South African Louis Oosthuizen and Australian Marc Leishman on Monday.
He had two in the four-hole playoff. By the end of the season Spieth is likely to be pulling in $5 million to $10 million in annual endorsements, said Matt Delzell, managing director of The Marketing Arm, who negotiates such endorsement deals.