Sandy Koufax is a great teacher. He just talks about competitiveness and being aggressive - about stride length, power, how to spin the breaking ball. The way he explains pitching is simple, which is something you don't see a lot.
If you're playing baseball, why are you playing baseball? Is it to have success on the field and be a Hall-of-Famer or whatever it is? Sure, that's everyone's goal. But then what? For me, it's about the legacy you leave off the field.
You are not supposed to convert anybody, that's God's job. But at the same time, you can be His disciple and live for Him and when people ask you why are you living for Him, you can show them why and profess your faith.