Graceful wind-up and delivery?

Fifteen years ago or so there was an African-American pitcher in the Majors who had a very graceful, fluid-like wind-up and delivery. It was a simple action, but it seemed like the guy was could throw the ball without much effort.

He threw his arms back, bending forward a bit, then brought his arms forward and grasped the ball with the gloved and bare hands, bent back a little and lifted his left leg while raring his right arm back and came forward on his left leg while bending forward and over-handing the ball. Simple and fluid, but effective. His technique was attention-grabbing. Somehow, also, he bobbed up and down a little bit during the wind-up.

He was pretty good. Who was this guy?