Howie Schwab, a sports nerd who parlayed his love of statistics into a long stint at ESPN that was most notable for his starring role as the ultimate trivia expert on the game show “Stump the Schwab,” died on Saturday in Aventura, Fla. He was 63.

His death was announced on social media by his wife, Suzie Davie-Schwab. His mother, Dona (Bressner) Schwab, said he was in a hospital being treated for an infection when he died, apparently of a heart attack.