La Rosa appeared in a range of television shows, including The Honeymooners in 1953, What's My Line?,
The Pat Boone Chevy Showroom, The Polly Bergen Show (two episodes, including the 1957 premiere), The Merv Griffin Show and Laverne and Shirley in 1980.
He starred in the 1958 film Let's Rock.
In 1977, he hosted an unsold game show pilot for NBC, Noot's Game.

In 1970, the singer/actor became a very successful and amiable disc jockey at one of America's biggest radio stations in the top market, Metromedia's WNEW-AM 1130 in New York City.
He hosted the 1:00-4:00 p.m. time slot at least through 1976, following William B. Williams' show which would eventually again become the Make-Believe Ballroom.
During his first tenure at WNEW the station was more of an adult contemporary format rather than the traditional standards La Rosa was known for.
He also sang some songs that were hits on the station.
Those included: "Fire and Rain," from the "Words" album (Metromedia label) in 1971, "What'll I Do," and "Save Me a Song" (RCA Victor label)."
 He also recorded "We Need a Little Christmas" (1966), played during the holiday season on "the Big W." La Rosa would return to WNEW in the 1980s, doing various air shifts after the station returned to standards and big bands.

In the 1980s, La Rosa received a non-contract, recurring role in the NBC soap opera Another World, playing the character Reynoldo, for which he was nominated for a Best Supporting Actor in the Daytime Emmy Award.

In 1998 and 1999, La Rosa was a disc jockey on 1430 WNSW based in Newark, New Jersey, hosting "Make Believe Ballroom Time".
La Rosa, profiled by jazz critic and composer Gene Lees, continued to work clubs and release records until the early 2000s.
New York Times film critic Stephen Holden said "His singing is very direct and unpretentious - he can wrap his voice tenaciously around a melody line and bring out the best in it."

La Rosa was a frequent contributor to comedian Jerry Lewis' annual Labor Day telethon programs for the Muscular Dystrophy Association, often hosting the New York outpost of the shows.
La Rosa appeared in a range of television shows, including The Honeymooners in 1953, What's My Line?, The Pat Boone Chevy Showroom, The Polly Bergen Show (two episodes, including the 1957 premiere), The Merv Griffin Show and Laverne and Shirley in 1980. He starred in the 1958 film Let's Rock. In 1977, he hosted an unsold game show pilot for NBC, Noot's Game.
In 1970, the singer/actor became a very successful and amiable disc jockey at one of America's biggest radio stations in the top market, Metromedia's WNEW-AM 1130 in New York City. He hosted the 1:00-4:00 p.m. time slot at least through 1976, following William B. Williams' show which would eventually again become the Make-Believe Ballroom. During his first tenure at WNEW the station was more of an adult contemporary format rather than the traditional standards La Rosa was known for. He also sang some songs that were hits on the station. Those included: "Fire and Rain," from the "Words" album (Metromedia label) in 1971, "What'll I Do," and "Save Me a Song" (RCA Victor label)."  He also recorded "We Need a Little Christmas" (1966), played during the holiday season on "the Big W." La Rosa would return to WNEW in the 1980s, doing various air shifts after the station returned to standards and big bands.
In the 1980s, La Rosa received a non-contract, recurring role in the NBC soap opera Another World, playing the character Reynoldo, for which he was nominated for a Best Supporting Actor in the Daytime Emmy Award.
In 1998 and 1999, La Rosa was a disc jockey on 1430 WNSW based in Newark, New Jersey, hosting "Make Believe Ballroom Time". La Rosa, profiled by jazz critic and composer Gene Lees, continued to work clubs and release records until the early 2000s. New York Times film critic Stephen Holden said "His singing is very direct and unpretentious - he can wrap his voice tenaciously around a melody line and bring out the best in it."
La Rosa was a frequent contributor to comedian Jerry Lewis' annual Labor Day telethon programs for the Muscular Dystrophy Association, often hosting the New York outpost of the shows.
Julius La Rosa