Plus, if he gets a job they'll mandate when he can play and when he can do whatever and it sucks.
Welcome to the rest of your life.
Which is why he should play lacrosse instead, he has his whole life to work. Unless he can balance it and do both I wouldn't take the job (unless there's pressure from your parents..like I had.)
Plus lacrosse opens you up to alot of stuff. It just looks good, it's a team sport which requires both individual work and the ability to work together. My lacrosse coach wrote me an awesome recommendation on leadership, an I think a really good recommendation and the experience lacrosse gives you is much better than a part time job.
Plus, pro lax players make like $12,000 a year. They do it because they love it, but they also have outside jobs. Of course he probably won't go pro, but it's a fun and healthy and just plain awesome pasttime. Maybe he'll play in college, maybe he'll get a scholarship - who knows?