After reading this trivia question, "How come???"

I am reading this trivia question, "Who was the only modern U.S. president to not throw out the first pitch at a season-opening baseball game?"
Answer: Jimmy Carter.
William Howard Taft started the tradition in 1910.
How come didn't Jimmy Carter throw out the first pitch at a season-opening baseball game? Anyone who may remember any reason for this.
Answer: Jimmy Carter.
William Howard Taft started the tradition in 1910.
How come didn't Jimmy Carter throw out the first pitch at a season-opening baseball game? Anyone who may remember any reason for this.