Why do you think Segura can't hit .300 in the majors? It's not like he was a career .270 hitter in the minors, the kid hit .313 over 6 seasons. I think .300 is an unreasonable expectation for his first full season. He may very well do it but that would shock me. I'd be perfectly content with .270 - .280 (cue the stat guy to tell me the difference between .280 and .300 is only X hits per week)