McGreevey's first major role was as cabin boy Chip Kessler in the 1959–61 TV series
Riverboat. He later remarked that stars
Darren McGavin and
Burt Reynolds often clashed, saying "they were just two very different personalities," but added that McGavin became a father figure and Reynolds "like a big brother" who even gave him his first football. During the 1960s and 1970s, McGreevey appeared frequently on Walt Disney's
Wonderful World of Color and in the
Dexter Riley comedies—
The Computer Wore Tennis Shoes (1969), ''
Now You See Him, Now You Don't (1972), and The Strongest Man in the World'' (1975)—as Dexter's friend Richard Schuyler. He also appeared in
Snowball Express (1972) and
The Shaggy D.A. (1976), both starring
Dean Jones. Outside of Disney, McGreevey guest-starred on series including
The Virginian,
Bonanza, and
Route 66. His feature film work included
The Way West (1967), where he played Brownie Evans, a pioneer who marries
Sally Field's character. After studying film at
UCLA, McGreevey co-wrote the 1978 made-for-TV movie
Ruby and Oswald with his father. He described it as "a three-way depiction of those four days in Dallas," blending documentary footage of President Kennedy with dramatizations of Ruby and Oswald. The project was sold to CBS with director
Mel Stuart attached. In 1984, he earned a Daytime Emmy nomination for co-writing the
ABC Afterschool Special "The Celebrity and the Arcade Kid". He later co-wrote the 2015 documentary
Earl Hamner Storyteller, focusing on the creator of
The Waltons. ==Filmography==