Combine facts and answer this: The Cleveland Cavaliers first began play in the NBA in 1970, as an expansion team under the ownership of Nick Mileti, Jerry Tomko, the father of future Major League Baseball pitcher Brett Daniel Tomko, submitted the winning entry to name the team the "Cavaliers" through a competition sponsored by "The Plain Dealer", Tomko is an American former professional baseball pitcher, played in which league?
A:
Major League Baseball