hurler vs baseball player

hurler and baseball player both are nouns.

Word	Noun	Adjective	Verb	Adverb
hurler	Yes	No	No	No
baseball player	Yes	No	No	No

As nouns, baseball player is a hypernym of hurler; that is, baseball player is a word with a broader meaning than hurler:

Other hypernyms of hurler include ballplayer, thrower.

hurler (noun)	baseball player (noun)
(baseball) the person who does the pitching	an athlete who plays baseball