A look at the highlights of what's happening all around spring training in Florida and Arizona on Wednesday: --- HE'S BACK Alex Rodriguez is set to be the designated hitter for two or three at-bats when the Yankees host the Phillies in Tampa, Florida. ''I have some challenges ahead.'' IN THE SWING Arizona slugger Paul Goldschmidt faces another major league team for the first time since his left hand was broken by a pitch last August. UP FIRST New Dodgers shortstop Jimmy Rollins is going to lead off in the spring opener against the White Sox. ON YOUR MARK Indians leadoff man Michael Bourn makes his spring debut vs. the Reds after spending the winter honing his running skills.