In his first-ever Major League start, Hank Gornicki of the Cardinals threw a one-hitter to defeat Philadelphia at Shibe Park, 6-1 on May 3, 1941. The thirty-year-old rookie gave up the lone hit to rookie outfielder Stanley Benjamin. Unfortunately, in spite of his impressive beginning, Gornicki would only go on to win fifteen games in his career.
Tough to put together a career when you debut as a pitcher at 30 years old.
True. You find yourself at the beginning stages of wearing down physically without the wisdom of experience to draw on to help you through it. Definitely would be a challenge.