There must not have been a lot of records set in 1978 if Topps chose to include this one. Mike Edwards - Most Unassisted DPs, Second Baseman, in a game. So how many did he turn in that one game?
Call me jaded, but just because something hasn't been done before doesn't mean it's automatically interesting. What's worse, the A's lost the game 16-5, and Edwards actually came out of the game in the fifth inning - who know how many more unassisted DPs he could have turned? After all, the Angels had 31 baserunners in the game - lots to double up.