kacchan: plays soccer and occasionally baseball but hits the ball to agressively it actually deflates and often flies into the middle of nowhere
uraraka: when playing tennis, like kacchan, she hits the ball so hard there is a burn in the middle of her racket
aoyama: i could imagine him in a figure skating outfit. actually he can't even play, aoyama's there for the diamond skates and shiny outfit
deku: probably the one cheering on the sidelines but wrestling could be a hobby
tsuyu: is great at leapfrog (remember that game where you have to leap over someone with their shoulders)
todoroki: archery but modern sports swimming, deku probably is on the sidelines eyeing his goods ;)
kirishima: full time competitive wrestler obviously, he would be going on complimenting how manly his rivals are in the middle of a fight
bakugou i see you betting your money for your man
sero & kaminari: they gives me the, "person arguing with his friend about which football team is the best in front of the tv both with doritos and mountain dew" vibes
mina: ping pong! she's a master at this game and has sometimes also been caught betting numerous amounts of bakugou's all might merch
causing lots of running so obviously she needs to be good at track too
momo: something regal like fencing or maybe gymnastics because she has the grace for it
mineta: the only time he has any interest in sports is when watching hentai about "sexy girls playing a game of volleyball! lots of panties!"
literally