Yankees rookie shortstop George Lombard Jr. left Saturday's second game of the doubleheader against Boston early with right knee discomfort. The team pulled him from the lineup as a precaution, though specifics on the severity remain unclear. For a young player trying to establish himself in pinstripes, any injury is unwelcome. The Yankees will likely have him evaluated further before determining whether he can return for upcoming games. Losing a promising rookie to injury, even temporarily, complicates the roster depth at a position where continuity matters. Updates on his status should come within the next 24 hours.