Born in Holton, Kansas, McComas first appeared in the Mickey McGuire short subjects series as a member of Mickey McGuire's gang and stayed throughout the series run in the silent era. He also played the role of Stinky Davis in some of the series' earliest sound shorts. In 1931, he joined the Our Gang series, first appearing in the 1932 Our Gang short Readin' and Writin'. McComas stayed with Our Gang for a full year and left the series after appearing in the 1932 Our Gang short Birthday Blues.
Even though he was well into his teens during his Our Gang tenure, McComas was very short for his age and thus capably portrayed his grade-school-age character Breezy/Brisbane. Breezy's mother refers to him as "Brisbane" in the films Readin' and Writin' and Spanky, the only shorts in which that name appears; the kids refer to him as "Breezy," presumably as a nickname for Brisbane. However, the Leonard Maltin/Richard Bann book The Little Rascals: The Life & Times of Our Gang lists his character as "Breezy Brisbane," a name which does not appear in dialogue in any of the shorts in which McComas appears.
McComas was being forced into retirement upon his 65th birthday in 1981. Saddened, he committed suicide two weeks earlier on October 15, 1981