Mark McKnight is a US Marine who appears in Call of Duty: Black Ops II, and he is an ally of Frank Woods and Alex Mason. He lives in Clayton, Panama with his wife Jane McKnight. His only appearance in-game is in the mission "Suffer With Me".
On December 19, 1989, after having an argument with his wife before joining them, McKnight briefed Frank Woods and Alex Mason at his house about Manuel Noriega, known as Objective False Profit, who was dangerously scheming against the government. Returning Mason and Woods to their vehicles, McKnight witness teenagers writing profanity on their vehicles. Angered, McKnight throws a beer can, but stops when Mason tells him they aren't worth it. McKnight later provides covering fire for Mason and Woods during the US invasion of Panama.