There are 1 Ump's Wrong trading cards tracked on HobbyCardIndex, spanning Baseball. The most valuable is the Ump's Wrong #64 at $6.99 raw.

Source: HobbyCardIndex · Updated daily · https://hobbycardindex.com/players/ump-s-wrong

Ump's Wrong Cards

Name: Ump's Wrong Card Price Index — Historical Data
Creator: HobbyCardIndex
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1 cards · Baseball

All Ump's Wrong Cards