Staples, in particular, has leveraged the naming rights to the Los Angeles Lakers arena into a lot of airtime on national TV, including three games of the NBA finals, where the red circle logo was often visible to viewers.

FORBES: Magazine Article

Sporting a corporate logo during games is indeed against NBA rules.

FORBES: Iman Shumpert Gets Adidas Logo in Haircut, Scolded by NBA

Sneakermakers Nike and Reebok are among the advertisers that pay EA to put their logos on the players (in one game, NBA LIVE, gamers can change the color and style of players' logo-emblazoned footwear).

FORBES: Name Recognition