(Photo: Topps 1978 baseball card)

STEVE ONTIVEROS

He may not have been a good replacement for Bill Madlock at third base, but Steve Ontiveros wasn't terrible. He came within one hit of batting .300 in 1977, a year in which ¾ of the Cubs infield was mustachioed, including good ol' #16.

He played parts of three other seasons with the Cubs and didn't do much before being released in the middle of the 1980 season. Nevertheless, he will always be remembered as the best mustachioed third baseman with a last name starting with "O" in Chicago Cubs history. No one else even comes close.