Hacer is an infinitive verbs. This type of verbs is the most basic form of Spanish verbs. So verbs in the infinitive form aren't conjugated and don't tell us anything about who is performing an action or the tense of the sentence. However, this sentence is given in the simple present because gusta is conjugated in the simple present for the third person singular. In fact, an infinitive verb often comes after the conjugated verb gustar. Finally:
A Jorge le gusta la clase de educación física porque le gusta hacer deportes
