Hardman was signed as an undrafted free agent out of Eastern Kentucky University in 2010 and has played in 12 games in two season with the Buccaneers, starting four. Hardman was released earlier this month, but the Buccaneers need help on the offensive line due to injuries to guard Carl Nicks and tackle Jeremy Trueblood.
Gilberry, a five-year veteran out of Alabama, was signed by the Bucaneers back in June, but did not play for the Buccaneers in their week one victory against the Carolina Panthers.
The Buccaneers play the Giants at MetLife Stadium on Sunday, with kickoff scheduled for 1 p.m. and the game will be televised on Fox.
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