Mark Aguirre (NBA) is a proper noun often used as a nickname-like reference for the former professional basketball player. In sports writing, players’ names are treated as units; as a verb phrase, it would imply acting in the manner of Aguirre, though that usage is rare. For most contexts, treat the string as a single name and pronounce each component clearly, with emphasis on the surname. (Note: the phrasing here mirrors a user-input label; in standard usage, this would be a named entity, not a verb.)
Full pronunciation guide