SAN DIEGO - Luis Castillo appears to be limping his way onto the disabled list and the Mets could make the move as early as Friday when the team begins a three-game series against the Marlins at Citi Field.

Castillo, who is now bothered by pain in both feet, has convinced Jerry Manuel to keep him in the lineup. But he looked to be seriously hurting after running the bases on two occasions during Tuesday's 4-2 win over the Padres.

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In the first inning, Castillo scored from third on David Wright's single, but awkwardly hopped on one foot after crossing the plate. It happened again in the seventh, when Castillo sprinted for an infield single, but couldn't stop until he reached shallow rightfield - then badly limped back to first base.

Castillo initially was bothered by a bone bruise under the front of his left foot, but in compensating for that injury, he now has a heel issue with his right foot.

"It kind of hinders him from walking normally, but he can run," Manuel said late Tuesday. "He says he feels fine and wants to play tomorrow. We'll have to revisit this when we get back to New York to make sure he's not injuring other things."