The Mesa Solar Sox beat the Phoenix Desert Dogs 10-6 on Opening Day in the Arizona Fall League Tuesday. Starlin Castro, one of the Cubs' top prospects, drove in three and scored a run in the win. Castro was the Solar Sox designated hitter and finished the game 3-for-5 with three RBI and a run scored. Castro delivered a two-out, two-run single in the top of the fourth and singled home his third run in the sixth. Several of the Cubs top prospects are participating in the AFL. Here's ...