Baseball bat

The Baseball Bat is a melee weapon found in Fallout 3, you pick it up from your desk right before you leave the vault. A special baseball bat called the Louisville Slugger is also available in Fallout 2 as a quest reward. Damage-wise, Fallout 3's Baseball Bat is a quite powerful melee weapon for early use and helps to preserve ammunition while starting out in the Wastes, but becomes a weak weapon as you gain levels and should be replaced with something a bit more powerful like the Ripper, Power Fist or Shishkebab.

Locations

 * At Minefield, near the mattress where Arkansas snipes at you.
 * A bit east of Bethesda Ruins. Here you will find a baseball field with 2 raiders seemingly playing Baseball. The "pitcher" will carry Frag Grenades.
 * At Canterbury Commons at Dot's Diner behind the counter next to the bed, you can pick it up without receiving negative Karma and without getting the people hostile.
 * Inside the Anchorage Memorial on the downfloor inside the clinic on a shelf. There is a dead mercenary lying beside it.