Softball Jerseys

Maybe I'm too much of a traditionalist (although I have warmed up to the Wild Card), but what is up with seemingly everyone (even the Cubs) wearing non-white or gray jerseys during the playoffs?

I completely understand the marketing aspects of this. Someone in the front office says, "we could get X thousand fans to shell out $50 or $150 for our new X color jerseys." But do the Marlins, A's, Cubs, and Twins have to wear them in every game?

I, for one, applaud the Braves, Yankees, Red Sox, and Giants (among the playoff teams) for sticking to a more traditional two uniform rotation.