Here are some randomly selected joke topics beginning with the letter 'B'
Baseball
Why was the baseball player sent to jail?
Because he stole second base.
Basketball
Why did the basketball court get wet?
The players dribbled all over it.
Baseball
Why is a game of baseball like pancakes?
Because they both need batters.
Bath
Doctor: The best time to take a bath is just before retiring.
Patient: You mean I don't need another bath until I'm sixty-five?
Baseball
In baseball, what type of dog stands behind home plate?
The catcher’s mutt.
Basement
What do you call a party held in a basement?
A cellar-bration.
Basketball
What is the difference between a dog and a basketball player?
One drools and the other one dribbles.
Baseball
What did the baseball glove say to the baseball?
I'll catch you later!
Baseball
What does a baseball pitcher like to do on his birthday?
Throw a party.