The List Of 23 Pitchers

[Max Power]

Just curious - what do you think the list of these specific pitchers, in this order, represents?

Roger Clemens
Lefty Grove
Walter Johnson
Pete Alexander
Christy Mathewson
Cy Young
John Clarkson
Kid Nichols
Steve Carlton
Don Drysdale
Greg Maddux
Old Hoss Radbourn
Sandy Koufax
Amos Rusie
Dazzy Vance
Hal Newhouser
Jim Palmer
Monte Ward
Pedro Martinez
Randy Johnson
Red Faber
Ron Guidry
Warren Spahn