Complex sentence: Additionally, he is involved in promoting sports (namely, basketball, baseball, and boxing), currently owns the Cangrejeros de Santurce (basketball franchise), and also formerly owned Puerto Rican sports television network Deportes Puerto Rico.
Split into simpler sentences: Additionally, he is involved in sports promoting (namely of basketball, baseball, and boxing). He is also the current owner of the Cangrejeros de Santurce (basketball) franchise and former owner of Puerto Rican sports television network Deportes Puerto Rico.