I understand he was known as Wrecking Ball in Junkertown or whatever, but I don't care and I don't think most people do. 

His name is Hammond. 

Pharah isn't named after her suit. D.Va isn't named after her suit. Why is Hammond.

And for the love of God it's so much cuter if a fat hamster tank is named Hammond. 

Everyone calls him Hammond anyways. Just do it.