[pitchernut]

Try to stick with cards that were commercially available while the player was still active in the majors. Having said that, when it comes to pre-WWII any and all commercially available ephemera (minor, major, cloth, pins, postcards etc) will do just fine. Working on 5 categories that I call "sets" for the past 30 years.

Set 1: Game winning pitcher of record (including saves) on the winning team of the World Series.

Set 2: Single season 20 game winners.

Set 3: Life time ERA under 3 with over 1000 innings pitched.

Set 4: Perfect/No-No hurlers.

Set 5: Top 100 Closers

Thinking of starting another category called "single season ERA under 3 with over 200 innings pitched".

Oh and to make things a little tougher, try not to go over $100 on a decent E107, W600, Rose Co....and those darn '52 Topps hi#....