Hi, hockey_505.
Do your legs brush against each other a lot when you play hockey or work out? The rash you are experiencing in your groin area and scrotum could be skin irritation from too much contact and rubbing. It could also be heat rash. Try applying a moisturising skin cream when you wake up in the morning, and make sure it gets lots of air after you work out or play hockey.
As for the shaving.... if you shave the hair clean off, you can get ingrown hairs, or irritated hair follicles that can actually cause a tag-like appearance. Provided you are not unsafe when sexually active, I think this just might be a the problem. Try shaving WITH the grain of the hair next time, and you shouldn't encounter as many of these skin tags.
If the problem continues to persist with the rash, I would see a doctor about it.... Any type of rash around the penile region can get messy!