This is an irregular verb. It follows the conjugation pattern of the verb vencer.
Present:
A Ana torce pelo time dela todos os fins de semana.
A Ana torce pela equipa dela todos os fins de semana.
Ana supports her team every weekend.
Preterite:
O Miguel torceu o tornozelo durante o jogo.
Miguel twisted his ankle during the game.
Conditional:
A Clara torceria por esse time.
A Clara torceria por essa equipa.
Clara would root for that team.