FORT WORTH, TX — A Texas high school baseball star was taken with the second overall pick in Saturday’s Major League Baseball Draft.Fort Worth Christian shortstop Grady Emerson was selected by the Tampa Bay Rays, one spot behind UCLA shortstop Roch Cholowsky, who was picked No. 1 by the Chicago White Sox.Emerson, a left-handed batter, was the Gatorade National Player of the Year at Fort Worth Christian, a private school in North Richland Hills.H…