1. Bob Feller

Bob Feller was a baseball prodigy who began pitching for 'Cleveland Indians' in 'Major League Baseball' at the age of 17. In 1940, 1946, and 1951, he threw no-hitters. He also has a record of 12 one-hitters. His tally of no-hitters and one-hitters was a record of his time.
2. Grover Cleveland Alexander

Grover Cleveland Alexander is often regarded as the greatest master of control. He has the rare achievement of accomplishing triple 'Pitching Triple Crown.'
3. Lefty Grove

Lefty Grove's nine earned run average titles are the most by any pitcher. He has won the 'Triple Crown' of pitching twice. His 0.68 winning percentage is the highest among those who have more than 300 victories.
4. Tom Seaver

Tom Seaver, nicknamed Tom Terrific, was named 'National League's (NL)' 'Rookie of the Year' in 1967 and later in his career won three 'Cy Young Awards.' His career records are 311 wins, 3,640 strikeouts, 2.86 ERA, and 61 shutouts.