yes. he is his great uncle
I found no information suggesting they are related. It seems they share the same last name and a love for singing Mexican music but no genes.
he is a baseball player
Yes. He is married to his high school sweetheart, Jessica Lugo.
Carlos Beltran is married. He wears number 15 because that's his wife's birthday.
Beltran went straight from Fernando Callejo High School to the major leagues