With his side already trailing to an early controversial goal from Alexis Sanchez, Moses got one-on-one with his direct opponent Alex Oxlade-Chamberlain on Chelsea's right wing.
Having tricked his way into the penalty box, Moses went down under Oxlade-Chamberlain's challenge and referee Anthony Taylor decided there was not enough contact.
Moses was therefore booked for simulation by the official and, as the Nigeria international had already been shown a yellow card for a foul on Danny Welbeck, he became the fifth player to be dismissed in an FA Cup final.
5 - Victor Moses is the fifth player to be sent off in an FA Cup final (Smalling 2016, Zabaleta 2013, Reyes 2005, Moran 1985). Dismissed.— OptaJoe (@OptaJoe) May 27, 2017
The Football Association announced earlier in May that it will introduce a new rule on diving for next season, with players able to be banned respectively if they are found guilty of simulation.
A panel comprising an ex-match official, one former manager and a retired player will meet to review each case independently.