During a 22-year career, Johnson, nicknamed "The Big Unit," pitched for six different teams.

The 6-foot-10-inch Johnson was celebrated for having one of the most dominant fastballs in the game. He regularly approached, and occasionally exceeded, 100 miles per hour during his prime. He also threw a hard, biting slider. Johnson won the Cy Young Award five times.

He pitched two no-hitters, the second of which was the 17th perfect game in baseball history. He was named an All Star 10 times throughout his career and was the World Series MVP in 2001 with the Diamondbacks.