In Flood v. Kuhn (1972), where the Supreme Court reaffirmed that baseball wasn't subject to antitrust law, Blackmun wrote:

Then there are the many names, celebrated for one reason or another, that have sparked the diamond and its environs and that have provided tinder for recaptured thrills, for reminiscence and comparisons, and for conversation and anticipation in-season and off-season: Ty Cobb, Babe Ruth, Tris Speaker, Walter Johnson, Henry Chadwick, Eddie Collins, Lou Gehrig, Grover Cleveland Alexander, Rogers Hornsby, Harry Hooper, Goose Goslin, Jackie Robinson, Honus Wagner, Joe McCarthy, John McGraw, Deacon Phillippe, Rube Marquard, Christy Mathewson, Tommy Leach, Big Ed Delahanty, Davy Jones, Germany Schaefer, King Kelly, Big Dan Brouthers, Wahoo Sam Crawford, Wee Willie Keeler, Big Ed Walsh, Jimmy Austin, Fred Snodgrass, Satchel Paige, Hugh Jennings, Fred Merkle, Iron Man McGinnity, Three-Finger Brown, Harry and Stan Coveleski, Connie Mack, Al Bridwell, Red Ruffing, Amos Rusie, Cy Young, Smokey Joe Wood, Chief Meyers, Chief Bender, Bill Klem, Hans Lobert, Johnny Evers, Joe Tinker, Roy Campanella, Miller Huggins, Rube Bressler, Dazzy Vance, Edd Roush, Bill Wambsganss, Clark Griffith, Branch Rickey, Frank Chance, Cap Anson, Nap Lajoie, Sad Sam Jones, Bob O'Farrell, Lefty O'Doul, Bobby Veach, Willie Kamm, Heinie Groh, Lloyd and Paul Waner, Stuffy McInnis, Charles Comiskey, Roger Bresnahan, Bill Dickey, Zack Wheat, George Sisler, Charlie Gehringer, Eppa Rixey, Harry Heilmann, Fred Clarke, Dizzy Dean, Hank Greenberg, Pie Traynor, Rube Waddell, Bill Terry, Carl Hubbell, Old Hoss Radbourne, Moe Berg, Rabbit Maranville, Jimmie Foxx, Lefty Grove. The list seems endless.

Wowsers. Roger Ian Abrams of Northeastern Law School reveals the origin of the list in his article Blackmun's List.