Giants signed TE Ryan Purvis, DE Craig Marshall, and C/G Chris White to reserve/future contracts. Purvis is a former undrafted free agent out of Boston College. He'll have a decent shot to stick in New York with Jake Ballard and Travis Beckum coming off torn ACLs. Marshall played college ball at Marshall (where else). White, 28, is a veteran of NFL training camps but has never actually started a game.