During the fight , Rousey would quickly take down Kaufman .
During the fight , Rousey would quickly submit her with an armbar in just 54 seconds to retain the Strikeforce Women 's Bantamweight Championship .
During the fight , Rousey would quickly take down Kaufman and submit her with an armbar in just 54 seconds to retain the Strikeforce Women 's Bantamweight Championship .