After doing Herb Pennock yesterday, I was looking at plaques and came across Jimmy Collins. Collins spent seven years with the then-Boston Americans and is likely in the HOF mostly on the basis of those years. He was one of the best position players in the early years of the American League.
This is his plaque:
There is no cap on his plaque. The only thing we have to look at is the collar and the tie. Luckily we also have this online exhibit from Dressed to the Nines.
Clicking on that link will lead you to what the Boston uniforms looked like in the early 1900's and the tie matches that on this uniform. I think it is clear Collins is wearing a Boston Americans uniform on his HOF plaque.