Related Clues:

• Rush letters?
• Figure
• Number on a baseball card
• Exec's request
• Team number
• Memo abbr.
• See 51-Down
• 'Make it quick!'
• Express letters
• P.D.Q.
• Sports figure
• 'By yesterday!'
• E.R. cry
• Ballpark figure
• Yards in passing, e.g.