I am going to go with the injury route, especially if the det. CoC is a rated officer. They know all too well the perils of any injury.
Let's say your AS100 yr goes fine, you are not an AFROTC scholarship cadet. AS 200 rolls around and assume you are on the swim team (non-contact sport), but you have now pulled out your rotator cuff and will require surgery, which means you may be medically DQ for SFT aka LEAD. That places the cadet in a precarious situation....can't be a POC without SFT.
Now let's say you want to go rated. You play soccer. Your AS 300 yr is just like your AS200 year. Boards and medical clearance. Repeat the scenario as above, however for rated they go to WPAFB for an FAA FC1 physical. Hard to be cleared if you are in a cast with pins in your ankle until you are out of the cast and cleared medically for the DoDMERB level.
I always ask this, which one do you want more...serve in the military or play a sport? I am not saying you can't do both. I am saying that on this site, especially on the SA side we jokingly say to posters when they get their appointment to wrap the appointee in bubble wrap. There have been many cadets that play spring sports and get injured, making them a medical turnback, thus which one do you want in the end. Is the risk worth the reward when you are in college.