Incredible dedication letter for one of Mantle's books with never before seen content. Written entirely in his own hand, this letter is quite shocking and mentions other ballplayers and reads, "I want to dedicate this book to all my friends old, new, + especially young friends. Please don't do alcohol + drugs. I never did drugs but Alcohol hurt my career terribly. People used to ask who was better? Willie, Mickey or Duke. I think you have to look at final statistics and Willie was far ahead at the end. Guys who took good care of themselves like Willie, Hank Aaron, Stan Musial, Ted Williams, Joe D. etc. were the ones at the top in the final stats. I did play in more games as a Yankee (2401) than anyone but if I had taken better care of myself I could have done a lot better. I didn't even take care or do my re-hab on my legs like I was supposed to. I drank too much when I was playing from 1952, after my Dad died, til 1969. After I retired in 69, I drank more + more (I'll always be ashamed of). So to everyone out there especially young people, Little Leaguers etc. "Don't end up over the hill before you even start to climb it." Make us all proud of you. Don't Do Drugs + Alcohol - Mick." Simply signed "Mick," this letter has a tremendous appearance and is truly one-of-a-kind. With a few other handwritten notes on the back in pencil, this letter really was a "work in progress" created by one of the most storied athletes in the history of sports. Authenticated and encapsulated by PSA.