The Iwatobi Swim Club needs one more member before it can participate in relays.  Nagisa has set his sights on his classmate Rei, who is a member of the track team.  Despite Rei's refusal to join, but Nagisa appears intent on recruiting Rei into the swim club.
I already joined the track team.
bin ich schon 
dem Leichtathletikclub beigetreten.
je fais déjà partie 
du club d’athlétisme.
sono già entrato nel club di atletica.
eu já me juntei ao clube de atletismo.
что уже вступил в клуб лёгкой атлетики.