The Red Sox have sent their top three sluggers back to Boston for medical tests, with Manny Ramirez and Wily Mo Pena heading East on Tuesday to join David Ortiz. Ramirez has played in only one of Boston's last five games because of a sore right knee and Pena has missed the last three games due to soreness in his left wrist. Ortiz was scheduled for more tests that were expected to take a few days.