Complex sentence: During his time at the University of Northern Colorado, Gaethje met and trained with Georges St-Pierre and other mixed martial artists, and he soon asked for his wrestling coach to arrange an amateur MMA fight for him.
Split into simpler sentences: During his time at the University of Northern Colorado, Gaethje met and trained with Georges St-Pierre and other mixed martial artists. Soon after, Gathje asked his wrestling coach to arrange an amateur MMA fight for him.