I am a week away from leaving for my All the Ballparks road trip to see all the Major League Baseball parks. Searching around today I found some MLB mascot coloring pages on MLB sites. Below are the links to them.
Houston Astros Junction Jack Coloring Pages
Philadelphia Phillie Phanatic Coloring Page
Los Angeles Dodgers Think Blue and Activity Page Print Outs
Baltimore Orioles Coloring Page
Texas Rangers Captain Corral Coloring Page
Boston Red Sox Wally Coloring Pages
Mascot Fever Coloring Pages - This supposedly has all the team mascots to color, but I could not get the print button to successfully work, but perhaps others can.