My dad is making me feel bad about playing sports, what do I do?

I'm going into the tenth grade, 15 years old, weigh 98 pounds, and 5 foot 7 inches tall. I have never played sports before because I never really liked it that much. Now I love baseball, softball, football, tennis, and badminton. My dad is teaching me how to play tennis, and a few days ago, I told my dad that I wanted to learn some other sports. Today I heard my dad talking to this man saying something like, "Yeah, he wants to learn sports now, but he will never be as good as he would of been if he had started at a young age." They were talking about baseball when my dad said this. Is this true? Will I never be as good? Is there something that I could do to be really good, and show my dad he was wrong? I just want to play sports now. Mainly baseball, tennis, and badminton. Please help me!!!!!!!!!!