In an undated handout image released by Sprint, Indianapolis Colts' quarterback Peyton Manning acts in an advertisement for Sprint. Judging by the frequency of his television ads, Manning is probably not wanting for product endorsement deals. But if his Indianapolis Colts win this Sunday's Super Bowl, the two-time league Most Valuable Player, already football's most prolific pitchman, stands to bolster his marketing riches to dimensions few gridiron stars have ever achieved, experts in sports marketing say. (AP Photo/Sprint)
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