49

Number 49 was traditionally worn only in spring training by players who were not on the major league roster, or by September call-ups. It became a regularly-used number in the 1970s when a number of those young players decided to keep their "irregular" number in the major leagues and found some success.

Notable players who have worn this number

• Tai-Shan Chang
• Warren Cromartie
• Larry Dierker, retired by the Houston Astros
• Ron Guidry, retired by the New York Yankees
• Bill Hands
• Teddy Higuera
• Charlie Hough
• Jair Jurrjens
• Javier Lopez
• Carlos Marmol
• Jose Mesa
• Tom Niedenfuer
• John Rocker
• Tim Stoddard
• Julio Teheran
• Tim Wakefield
• Hoyt Wilhelm