Dane Myers hit a walk-off home run with two outs and two strikes to lift the Miami Marlins to a 6-5 win over the Houston Astros in spring training action on Monday in Jupiter, Fla. Myers' third homer of the spring came off Cole McDonald (0-2), who had struck out the first two batters of the ninth inning. The shot to right center completed a Marlins rally from down 3-0 and 5-2, ignited when Jake Burger and Jazz Chisholm Jr. hit back-to-back homers in the sixth.