The Batter didn't have much on him upon arrival. Just his baseball uniform (including his hat, the hat is v. important) and his bat. Like any other RPG character he would've had an inventory of various healing and level-up items but they aren't particularly necessary for RP here. He would've been accompanied by his Add-Ons - large white rings named Alpha, Omega, and Epsilon - but they're more considered allies in battle than weapons.

Jeremy Fitzgerald on the other hand would have nothing but the clothes on his back.