Bradshaw, who served the first portion in June and July, was permitted to leave the jail to report to work as a member of the Giants under an agreement that he return Feb. 15.
The sentence was for an underage drinking offense at the University of Virginia in 2004 and a petty larceny charge while he was at Marshall in 2006, Bradshaw has said. He had been placed on probation in Virginia in either 2001 or 2002 for a crime as a juvenile.
Completing the sentence will satisfy all of Bradshaw's legal obligations, Stacy said, but he added in a telephone interview that he could not say when Bradshaw will be freed.
"Jails control how that time is calculated," he said, noting that prisoners sometimes are forced to serve the entirety of their sentences while others get out early for good behavior.
Bradshaw has been the Giants' No. 3 running back and primary kickoff returner the past two seasons. He finished with 355 yards rushing on 67 carries with a touchdown last season.