Purvis, a Boston College graduate, signed as an undrafted free agent with the Tampa Bay Buccaneers in 2009. He played in 10 games for the team during his time there, hauling in five catches for 38 yards and three first downs. He was released on September 3rd, 2011.
White and Marshall are more familiar names as both spent time with the Giants during training camp.
White, originally an UDFA signed by the Green Bay Packers in 2005, is a seven-year NFL veteran. Listed at 6'2'', 295 lbs., White has played 33 NFL games (eight starts) at both guard and tackle. In addition to two seasons in Green Bay, White has played for the Seattle Seahawks and Houston Texans.
Meanwhile, Marshall, who was a teammate of Jason Pierre-Paul at South Florida, not only spent time with the Giants in training camp, but also had two stints on their practice squad (the most recent in November). He's listed at 6'4'', 279 lbs.
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