Complex sentence: Surprisingly, Morris discovered that in spite of his age, and having several surgeries on his arm, he was able to throw 12 consecutive 98-mph fastballs.
Split into simpler sentences: Surprisingly, Morris discovered that in spite of his age, and having several surgeries on his arm, he was able to throw a 98-mph fastball. In fact, he threw 12 consecutive 98-mph fastballs.