Why Giants would make a mistake in letting go of Landon Collins and Olivier VernonIs saving cap space worth losing two playmakers?3/1/2019, 6:12 PMPittsburgh Steelers running back Fitzgerald Toussaint is tackled by New York Giants defensive end Olivier Vernon and safety Landon Collins during the first quarter of a preseason game at MetLife Stadium. / Brad Penner/USA TODAY Sports