I tried out for Tennis, Color Guard/Flag Team, and Cheerleading. I didn't make the cheerleading squad but I was okay with it since I made the Color Guard.
My junior year I tried out for Color Guard Captain, if the decision had been solely up to the band director I would never have made it but since it was his last year the Principal got to have his input and I was made Captain of the overall squad, Co-Captain of the Rifle Line and Captain of the Flag Line. I also got the coveted sabre (very light swords) solo during the Winter Guard Season.
Good luck to your DS, hope he makes the team!