If Plaxico Burress doesn't return to the Giants, Eli Manning believes that wide receiver Mario Manningham can be the team's deep threat. "I think we're hoping Mario Manningham can do that for us and be one of those guys who has speed and can run and make those deep catches," Manning said. "I think we have guys who can do that, but we'll see what happens the rest of the offseason and in the draft. Maybe we'll add another guy. Some of that is going to depend on Plaxico and what he's going to do." Manningham, a third-round pick in 2008, struggled last season after missing most of training camp.