bullpen catcher
Baseball term for a catcher who warms up pitchers in the bullpen. Not a common everyday word.
He works as a bullpen catcher for a professional baseball team.
Gaming term for a character role that absorbs damage to protect the party. Used mainly in MMORPG contexts.
The tank takes enemy attacks as the party's shield.
Compound of 壁 (wall) and 役 (role). The literal meaning 'wall role' is extended metaphorically to a person who acts as a barrier or absorber, first in baseball and later in gaming.