Giants co-owner John Mara ended his monthlong stint on jury duty yesterday when he helped convict two men and acquit two others in an international drug case.

“I think the system worked,” he said while leaving Manhattan federal court.

Mara had tried to do an end run around jury service by citing his need to prepare for the draft, telling the judge, “It is a big, big period for us, and I need to be at [work] during that period.”