Featherweight Calvin Kattar took questions from the press at the official UFC Vegas 63 media day ahead of his main event matchup with Arnold Allen on Saturday.

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By: UFC - Ultimate Fighting Championship
Title: Calvin Kattar: 'Every Time You Step in There, You've Got to be Ready to Grind for 25' | UFC Vegas 63
Sourced From: www.youtube.com/watch?v=S0gDaQ2Ldz0