I sent mine in top loaders....I cant remember ever damaging a card by removing it from one....I would assume that if there capable of grading a card they can remove one out of a top loader with out reducing its value....I would hate to be proven wrong on this....lol!
Players/Teams I PC:
NBA: Bradley Beal ~ Klay Thompson ~ Derrick Favors ~ LA Lakers
MLB: Adalberto Mondesi ~ Dylan Bundy ~ Albert Almora ~ LAA Angels
NFL: Brock Osweiler ~ Teddy Bridgewater ~ Green Bay Packers