Complex sentence: He defended his title 10 times, including wins over Ray Lunny, Sigfredo Rodriguez and Tyrone Everrett, before losing it on January 28 of 1978 to Alexis Argüello of Nicaragua by a knockout in round 13 in Bayamón.
Split into simpler sentences: He defended his title ten times, including wins over Ray Lunny, Sigfredo Rodriguez and Tyrone Everrett. He lost his title on January 28,1978, to Alexis Argüello of Nicaragua by a knockout in round 13 in Bayamón.