College coaches don't care what grade a player is. If he can play, he'll play. My son was starting on the weekend 3 weeks into his freshman year but he was throwing 90+ when most of the other guys were 86-88 so that helped. He had 8 freshmen start their career with him.....only 3 were left on Senior day....but 3 other guys had come in...so they had 6 seniors by the time he left. The guys that left were for various reasons.....with lack of playing time being the biggest issue for them.