WordNet
n. a member of a major-league baseball team [syn: major leaguer]
Wikipedia
Big Leaguer is a 1953 film. It starred Edward G. Robinson and was the first film directed by Robert Aldrich.
Although this story is fiction, Robinson's character in it, Hans Lobert, was an actual baseball player who played for five Major League Baseball teams and managed the Philadelphia Phillies. Third-billed in the cast, Jeff Richards was a professional ballplayer before he became an actor, and Hall of Fame pitcher Carl Hubbell appears as himself.
Usage examples of "big leaguer".
Could see groups of SSA Commandos firing anti-crawler missiles, but weapons that could be carried by hand wouldn't keep the big Leaguer machines at bay forever!
The whole thing's guarded by eight big Leaguer tanks of some kind-shouldn't be much of a problem for those fieldpieces you're in.
He was as much of a big leaguer as DeOrsey, and like DeOrsey he agreed to serve as agent without pay.