Orlando "El Duque" Hernandez headed to New York on Sunday for tests on his ailing right shoulder. According to general manager Omar Minaya, Hernandez felt tightness in his shoulder. The 41-year-old right-hander, who threw a bullpen session Saturday, has started strong this season, going 2-1 with a 2.53 ERA. Hernandez, who battled neck arthritis and a right hamstring cramp in spring training, is scheduled to start tonight against the Marlins and Minaya said he believed Hernandez would still take the mound.