There are 2 John 'Mule' Miles trading cards tracked on HobbyCardIndex, spanning Baseball. The most valuable is the John 'Mule' Miles [Mini] #117 at $3.93 raw.
Source: HobbyCardIndex · Updated daily · https://hobbycardindex.com/players/john-mule-milesJohn 'Mule' Miles Cards
2 cards · Baseball