Pletcher chasing another Kentucky Derby with multiple horses (The Associated Press)

In the unpredictable world of horse racing, Todd Pletcher is as steady and predictable as they come. Amid the hubbub of Kentucky Derby week, Pletcher is steely cool, with not a gray hair out of place or a spot on his jacket with the popped collar he wears to ward off the morning chill. His habits are a direct reflection of his mentor, D. Wayne Lukas, a Hall of Fame trainer with four Derby wins to his credit. Lukas will saddle Mr. Z in Saturday’s 141st Derby, and then watch with pride as four of his former assistants try to beat him.