Complex sentence: On the January 11,2016 edition of "Raw", Kalisto defeated Del Rio in a rematch to win the WWE United States Championship, his first championship on the main roster and his first singles title in WWE.
Split into simpler sentences: On the January 11,2016 edition of "Raw", Kalisto defeated Del Rio in a rematch to win the WWE United States Championship. This was his first championship on the main roster and his first singles title in WWE.