WASHINGTON -- The Nationals have promoted right-hander Orlando Hernandez from the Gulf Coast League Nationals to Double-A Harrisburg, while infielder Stephen Lombardozzi went from Class A Potomac to Harrisburg on Tuesday.

Hernandez, now a reliever, pitched in five games and allowed one run in five innings for the Nationals.

This is Hernandez's second tenure with the organization. On Jan. 15, 2003, Hernandez was part of a three-team trade that sent him from the Yankees to the Expos. However, he never played a Major League game for the Expos. After pitching one Spring Training game, Hernandez went on the disabled list and then had rotator cuff surgery.

Hernandez, 40, is 90-65 with a 3.72 ERA in nine big league seasons. He is best known for his years with the Yankees, who he helped win three consecutive World Series titles from 1998-00. He also helped the White Sox win a World Series in '05. Hernandez's best season was in '99, when he went 19-7 with a 4.12 ERA for the Yanks.

As for Lombardozzi, who was selected by the Nationals in the 19th round of the 2008 First-Year Player Draft, he was hitting .293 with one home run and 38 RBI in 110 games for Potomac. He was also 20-for-30 in stolen-base attempts and scored 71 runs. In 107 games at second base this year, Lombardozzi committed only six errors.

Martin undergoes successful surgery

WASHINGTON -- Right-hander J.D. Martin had successful back surgery on Tuesday, performed by Dr. Robert Watkins in California. The disc surgery lasted less than an hour.

Martin, who is expected to make a full recovery and be ready for Spring Training 2011, pitched in nine games and went 1-5 with a 4.13 ERA.

Right-hander Luis Atilano is out for the season after having bone chips removed from his right elbow this past Thursday. The original plan was for Atilano to rehab the elbow and then try to have surgery after the season.

Atilano made 16 starts and went 6-7 with a 5.15 ERA for Washington.

Center fielder Nyjer Morgan went to Nashville, Tenn., on Monday to get a second opinion on his right hip. The MRI revealed that he has flexor strain. The injury is not considered serious. Morgan, who is on the disabled list, hopes to be back in action by the time the Nationals travel to Atlanta to play the Braves on Aug. 17.

Left-hander Ross Detwiler had an MRI taken on his right hip Monday and the results are not in yet. However, Detwiler said the hip is feeling much better, but there is no timetable on when he will return to action.