Playing intercollegiate sports in the US is not a hobby but a real time commitment between practices, conditioning and tournament play, often with events that require a full day of travel. If a 2.8 is in fact an accurate snapshot of your son’s academic level, I would question whether he would succeed in a tough major as engineering while also playing golf. What exactly are his priorities? Studying in the US? Studying engineering? Playing golf? What is his level of play (has he played in junior tournaments in the US or your region, what level was the competition and where did he place)?
Pull up rosters of programs that he might be interested in. Look at the player stats, backgrounds/bios and their majors to see where your son stacks up. I can assure you that you will find very few hard core STEM majors on any roster.