Weekend Trivia Challenge for 3/11/2022

This champion of yesteryear certainly earned his oats with enough work for at least three of his modern counterparts put together. Not only did he make 19 starts during his busiest season, but in his "spare time" he was used as a work horse to encourage a lazy and cantankerous but talented stablemate into putting some effort into workouts. Remarkably, he finished the season sound and was able to keep racing the following year. Name him, and name the stablemate he was used to sharpen.