While fooling around trying to find some background facts on Richard "Dick" Linthicum, the some time UCLA basketball All-American (See Linthicum All-Americans) and State Department diplomat I came across a reference to a Dick Linthicum appearing in a 1929 Mack Sennet silent movie called "Uppercut O'Brien". Since Hollywood used college athletes as extras at that time, see Marion (John) Wayne, I assume this is the same Dick Linthicum..
Writing credits (in alphabetical order) Hampton Del Ruth scenario Harry McCoy scenario Earle Rodney scenario John A. Waldron scenario
Cast (in credits order) Harry Gribbon Andy Clyde Marjorie Beebe Patsy O'Leary rest of cast listed alphabetically: Ernie Alexander .... (uncredited) Hodson Beldam .... Football Player (uncredited) . . Dick Linthicum .... Football Player (uncredited)