Closest one I've read that mathes your description is the ML for Rumspringa mo Joukei (he's not sporty, but still fit). BL
I enjoyed My Guildmate Next Door, and the ML ticks most of your boxes, but he's not outgoing, rather awkward and really, *really* dense in a endearing way (also BL).
manga recs with those outgoing, dense, sporty mls? theyre so my type