When my son was a freshman he played in a program that only allowed 1 freshman on the varsity squad. My guy was one of 2 that was being considered for the spot. My guy was about 5'10" and 160 pounds, the other freshman was about 6'4 and 210. It was a close competition but the big guy got the spot.
The big guy was a very good player, but sat the bench most of the season earning a couple starts and primarilly played a back-up role.
My guy started at short on the freshman team, started and played on the JV team as well, playing the max number of games permitted each week, and was only on the bench when he was waiting for his turn to hit in the line up.
There is nothing wrong with earning your spot and playing the role your coach wishes for you to play.
Some coaches are going to want to let those juniors and senior enjoy some of the best years of baseball they will ever have. For many it will be their last.
I respect coaches that are loyal to their returning players.