pitcher –n. the player who throws the ball to the batter in baseball
designated hitter –n. a player who bats (usually in place of the pitcher) but does not play on the field
roster –n. a list of players on the team
rookie –n. a first year player in professional sports (and in some other jobs)
role –n. the part someone plays in a group effort
MVP (Most Valuable Player) –n. an award in some professional sports given to the player considered better than all the others
spectator –n. someone who watches an event, usually a sport with many people in attendance
standing ovation –n. when people stand and clap to recognize a good job by a performer