There are 2 John Hopp trading cards tracked on HobbyCardIndex, spanning Baseball. The most valuable is the John Hopp at $49.99 raw.

Source: HobbyCardIndex · Updated daily · https://hobbycardindex.com/players/john-hopp

John Hopp Cards

Name: John Hopp Card Price Index — Historical Data
Creator: HobbyCardIndex
License: https://hobbycardindex.com/legal/terms

2 cards · Baseball

All John Hopp Cards