What is B T in a baseball roster?

Answer 1

The "B" stands for bats, whether the player hits from the right side or left side or is a switch hitter (S)

The "T" stands for throws, whether the player throws righthanded or lefthanded.

Answer 2

The Baseball roster is to help keep the team organized. The B stands for the word bat and helps to keep track if the player bats from the right or the left side. The letter T stand for throws and whether they throw left handed or right handed. There is also the letter S, which stands for Switch Hitter.