Kevin Costner has starred in his share of movies over the many years of his above average career. Some of his first work that people really remember was his part in Bull Durham. This was a movie about baseball and showed the lives of different baseball players. Kevin Costner was the main star in the movie. He played an aging baseball player who was pretty good but not great. He had spent the largest part of hes career in the minor leagues. He becomes more of a mentor to the younger player toward the end, and he does a good job at it.