Duffel bags are a staple for all sports, not just baseball. Along with other sports, baseball duffel bags are perfect for storing a ton of gear so that you don't have to carry around multiple bags. Some even come with separate compartments for bats to keep them in tip top shape and not falling about all over your other gear. You can pack an incredible amount of gear into a baseball duffel because it allows you to use an open space for whatever gear you've got, no specified list. Your favorite baseball brands like Easton and DeMarini also create some of the best bags you can find.