I love how Greg Maddux knew how to pitch, and didn’t rely on just throwing the baseball.
Greg Maddux could throw 90-93mph if he wanted to, when he first broke in the league, he was throwing 92 with average control, I believe(correct me if needed, I never saw him pitch in the early days for the Cubs). He pretty much was average. Then he put together a string of good seasons with the Cubs, and signed in free agency with the Atlanta Braves.
Leo Mazzone, the Braves’ pitching coach at the time, was ecstatic when the Braves signed Maddux. Leo knew Maddux was a good pitcher, but he made him great. Leo schooled Maddux mentally, particularly in the approach of throwing low&away, and getting movement on fastballs. For Maddux to get the best control, he softened his velocity, and relied on less effort when pitching.
In my opinion, Maddux has the best mechanics/brains of any pitcher who ever stepped on the mound. He made pitching easy. After all, it’s not hard to throw an 86mph two-seam, mixed in with an 88mph 4-seam, is it??
That changeup he threw helped also.