My son didn't have a job outside of HS all four years .He took hard classes maintained a 3.7 GPA and eventually got his education basically paid for.
He did community service, worked hard in school, worked hard at baseball and conditioning and had some social time. he did chores, kept his room up, helped around the house,yards etc.
To work,have good grades and pursue a serious baseball college option is a more than full time job. Work ethic is work ethic, they have it or they don't.