Clayton “Clay” Guida (/ˈɡwiːdə/; born December 8, 1981) is an American professional mixed martial artist, currently signed to the UFC competing in the Lightweight division.[4] A professional competitor since 2003, Guida also formerly competed for Strikeforce, the WEC, King of the Cage, and Shooto. Guida was the inaugural Strikeforce Lightweight Champion. He is the younger brother of fellow mixed martial artist, Jason Guida.