Last three first-round holdouts about money, not fourth-year guarantee

There’s a common misconception in media circles that the last three unsigned first-round picks — No. 17 (Pats offensive lineman Nate Solder), No. 18 (Charger defensive tackle Corey Liuget), and No. 19 (Giants cornerback Prince Amukamara) — have yet to agree to terms because the players want all four years of their contracts to be…