Very cool postcard indeed.
From 1951 through 1955, the Clowns played most of their "home" games in Buffalo. Merchant was with the Clowns in those years.
Can't quite match any face in the postcard with this picture of him, but maybe you'll have better luck:
http://baseballgames.dreamhosters.co...520517p3aL.jpg
Article is here:
http://baseballgames.dreamhosters.co...uesBuffalo.htm