It is always possible that using a service like legal zoom your application was poorly done.
'Sport' is a relatively generic term in apparel and arguing about it is unlikely to move the argument in your favor, in my opinion. If Blockbuster were still alive and you tried to register Blockbuster Video Rental, you would have no chance for the same reason. The concern the USPTO has is that casual shoppers who like Kathy F Browns may not remember that name clearly, will see your brand, and think they are just recalling the name incorrectly. Attempting to overcome a likelihood of confusion rejection in this situation is unlikely to yield success (<50% IMO).
If you wish to persist, there is a helpful 7th Circuit case that suggests common surnames like Jackson, Smith [or Brown] are sufficiently common that consumers will not be confused to think that two goods bearing the same common surname come from the same source. Search Peaceable Planet Inc. v. Ty Inc.
Good luck,
Todd
Answered on Feb 11th, 2014 at 11:19 AM