Roethlisberger's name was replaced on a tall pole the zoo uses to show elephants' height compared to people, WTAE-TV, Pittsburgh, reported.
The zoo has replaced Roethlisberger's name with that of Pittsburgh Penguins owner and NHL Hall of Famer Mario Lemieux, the television station said Friday.
Some zoo visitors had expressed concerns about Roethlisberger's name on the display, zoo spokeswoman Tracy Gray said.
Roethlisberger was accused of sexual assault by a 20-year-old woman in Milledgeville, Ga., in March. After a police investigation, no charges were filed.
The NFL suspended Roethlisberger for the Steelers' first six games of the 2010 football season.