MESA, Ariz. (AP) -- Sammy Sosa was once one of baseball's most popular figures, a prodigious home run hitter who raced enthusiastically to his position and tapped his heart to salute adoring fans in the Wrigley Field bleachers. Now one season after his bitter departure from the Chicago Cubs, the 37-year-old Sosa is probably headed to retirement, his days of circling the bases over. If that is the case, he leaves behind a conflicting legacy. "I imagine it's frustrating when you get to this point in your career and you can't get a guaranteed contract. I can't imagine what that...