The McNair's are basically paying for two full offensive lines
Whether via trade or outright releasing a player, every team has to cut fat on their roster. “Due to the structure of NFL contracts, when a team chooses to forgo the remainder of a player’s deal, it assumes a financial penalty known as dead cap. Spotrac defines Dead Cap money as:
Any future, unpaid, guaranteed salary or bonus + any already paid signing bonus that hasn’t yet been allocated to...