Can you carry a baseball bat in professinal baseball?

Me and my brother were playing baseball outside and he ran the bases with the bat and when i tried to tag him he swung at the ball and it went into our neighbors bushes. Can you give me some links if you find it?|||in professional baseball, no you are not allowed to run with the bat.And as far as I know, its one of those unwritten but understood to do so rules.|||No, i dont think so