Selig, speaking on ESPN 1000's "The Waddle & Silvy Show," was asked about the possibility the same day the National Basketball Association's Board of Governors approved the use of advertising patches on its uniforms.
The NBA estimated the advertising could produce $100 million, but Selig told the radio show he'd like to keep baseball's historic threads as is.
"You learn never to say never, but you know, with us, uniforms are really important," Selig said. "They're history.
"You can close your eyes, and that Cub uniform, my goodness gracious, I can remember [that from] when I was 10 years old, and that's a long time ago. And there's the Yankee pinstripes and the Red Sox, and so on and so forth, so I've been pretty consistent on that."
Selig also was asked once again about instant replay, which will be expanded to trapped balls and what Selig called "bullets" down the line. That's as far as MLB will go as of now.
"Baseball is a game of pace," Selig said. "I'm not going to comment on other sports, but I know our sport, I know it well. ... I obviously talk to a lot of people every day. We're going to expand it to -- as I call them -- bullets hit down the right- and left-field line, and trapped balls in the outfield. I must tell you, not only that committee unanimously, but many others have said, 'Commissioner, boy, that's enough now.' And I agree with them.
"When I say there's no appetite for further replay, I wasn't kidding. There's none. And there are some people who think I may have done more than they hoped I would do."