Wishaw, Lanarkshire born wing half Bob Pollock started his football career with hometown junior club Wishaw Thistle in 1896 and joined Scottish League Third Lanark in 1897 for a spell before returning to Wishaw Thistle later the same year. He went south to join Southern League Bristol City the following year and after a season with The Robins he joined Kettering. His first recorded senior game (he would have played Southern League games of which we have no record at present) is an FA Cup tie for Kettering against Crewe Alexandra in January 1901, a match that was won 1-0 at Rockingham Road.
He joined Notts County later in 1901 spending 1901-02 on the books of The Magpies without making a first team appearance, and joined Second Division Leicester Fosse in the 1902 close season, making his Football League debut at Preston North End that October and establishing himself immediately as a mainstay of The Fossils’ first eleven. He remained so until losing his place in February 1909, having helped Leicester to promotion to the First Division for the first time in their history the previous season as Second Division runners up. In the summer of 1909, after 19 goals in 230 appearances for The Fossils, he joined Southern League Leyton, spending a single season in East London before returning to Leicester, this time with non league Leicester Imperial in 1910.