Jim Elbrecht wrote:

Who spells it? They both sound the same.

But while putts and putz are homophones, they mean different things.
Even one who putts on a golf course is likely to putz around his house
on occasion. And though he might putt around the house, he is not
likely to putz around on the golf course.


Plus there's a big difference between the verb "putz" and the noun with the
same spelling.