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By Mark Hyman
WON'T "THINK TWICE." Mickelson takes the sniping at his wholesome image in stride, as do his corporate backers. "Some of it is professional jealousy," says Larry Dorman, Callaway Golf's (ELY ) senior vice-president for global public relations. "People who are relentlessly positive are always portrayed as being phonies or Pollyannas." And what's known about Mickelson's sports bets wouldn't trouble most sponsors, says Marc Ippolito, senior VP at Burns Entertainment & Sports Marketing, which helps companies in search of sports endo