The voice of 'Shirley' from the cleaners on the answering machine at the beginning is the voice of Pat Finley, who plays Dennis Becker's wife, Peggy.
Character actor, George Wyner (Brice) would appear several times in the series' run, always as a milquetoast-type. He would be one of the actors brought back for the films, made in the1990's.
Sherry Jackson appeared in two episodes of the Maverick (1957) TV series, but neither was with James Garner. The first (The Naked Gallows (1957)) was with Jack Kelly as Bart Maverick, and the second - oddly enough, titled Red Dog (1961) - was with Roger Moore as Beau Maverick.
The first of nine shows of the series directed by Ivan Dixon.
As Rockford explains to Christine, the episode's title comes from a term used in (American) football.