I sprained my MCL a few yrs back, and since then I wear a Shock Doctor Knee Sleeve on both knees (to provide compression, warmth, and support) and then on the outside of both I wear a padded knee pad (like a wrestling) to allow for minimal impact when practicing shots, as well as padding for when my knee may accidentally hit a training partner as well as for when an errand limb might hit or land on my knee.