Lozada was a member of Puerto Rican boy bandMenudo during its golden years, joining the group in 1980 and staying until early 1984. After leaving Menudo, he formed the singing group Proyecto M with Rene Farrait and Xavier Serbiá, who were, like him, Menudo alumni. After the dissolving of Proyecto M, Lozada took on acting participating in several Latin telenovelas. In 1998, Lozada and other former members of Menudo received an invitation from Ray Reyes and formed El Reencuentro, to reminisce the years they had spent with Menudo. The concerts proved to be a success, and the tours extended for several years.
In 2010, Lozada joined Sal y Pimienta, a Latin gossip show, as a commentator. After two years, he left the show to host ¡Despierta América!.
Lozada joined Menudo at the end of 1979, replacing original member Carlos Meléndez. Lozada spent the next four years with the group. During that time, he participated in albums like Más, Mucho Más (1980), Fuego (1981), Quiero Ser (1981), Por Amor (1982), and A Todo Rock (1983), among others. He also starred in the telenovelasQuiero Ser and Es por Amor, both based on the group. Finally, Lozada acted in the films Menudo: La Película and Una Aventura Llamada Menudo.
During this time, the group enjoyed success in all of America. According to creator, Edgardo Díaz, this installment of the group “opened a lot of doors in Latin America, and was very strong”. Among their achievements are four sold-out concerts at the Madison Square Garden in 1983, and record-breaking concerts in Brazil with an audience of 200,000 in Sao Paulo and 100,000 in Rio de Janeiro and Belo Horizonte.
Lozada was considered the most emotional of the group, and his hits with the group included the classic “Clara”, “Mi Banda Toca Rock”, “Lady” and “Señora Mia”.