Claimant testified he had played softball in jail but was unable to swing a bat and had to have a pinch hitter.
He has been used in the role of a pinch hitter and he has filled it with great success.
Idioms and Phrases with pinch hitter
A substitute for another person, especially in an emergency. For example, Pat expected her mother to help with the baby, but just in case, she lined up her mother-in-law as pinch hitter. This expression comes from baseball, where it is used for a player substituting for another at bat at a critical point or in a tight situation (called a pinch since the late 1400s).
[ Late 1800s