Don Baylor 1970-75
After his playing days were over he managed the Rockies for the first six years of their existence from 1993-98 and was also the manager for the Cubbies from 2000-2002.
At first this made me a little mad but then I got over it. Most guys don't like to sign over their face and since he was using a pen, his signature wouldn't have really shown up on the front. And he did take the time to sign this and return it to me so I have no cause to be mad at Ken. He pitched in 61 games, primarily as a reliever, over the course of almost two full seasons for the Birds.