A baseball is a ball used primarily in the sport of the same name. The ball features a rubber or cork center, wrapped in yarn and covered leather.
- Collectible baseball - A rare variant of the regular baseball, worth double the caps but unfit for the crafting of baseball grenades.
- Signed baseball - A unique baseball signed by pre-War baseball players. It can be traded to Moe Cronin for a special caps reward during the quest Out in Left Field.
- Youth League baseball - A unique variant stored in the Jamaica Plain Town Hall basement treasure room.
- Fifteen in Swatters
- Nine Boston mayoral shelter.
- Six in D.B. Technical High School.
- Six in Hubris Comics.
- Six in WRVR broadcast station.
- Five in Malden Center.
- Four in a bucket, in the park next to BADTFL regional office.
- Three in Beacon Hill pub.
- Three in Shamrock Taphouse.
- Three in Vault 75
- Fort Strong armory
- Nuka-World (add-on) 19 in the carnival game booths southeast of the entrance to the RobCo Battlezone.