I'm glad you said the Rockies...they're my #2, with the Marlins very close thereafter The Pirates, Nationals, and Jays logos are all awful as well; these teams can all (and mostly have done in the past) better I also hate the A's logo, but it has history, I suppose. My #1, which I have special hatred for, is the embarrassing and racist Cleveland Indians logo. This still shocks me that people can feel OK rooting for a team with that logo (It shocked me even more when I saw a bunch of white guys with the grinning Indian logo painted on their face last ALDS/ALCS...shades of Jolson and the only time I have ever rooted for the Red Sox). To end it on a less controversial note, I really love the Brewers logo...I know many find it dull and too close to the "Cheers" logo, but I think it fits like a glove, and the M and barley shaft hat are both appropriate and stylish