|Full name||Robert Pollock Bonthron|
|Date of birth||1880|
|Place of birth||Burntisland, Scotland|
|Date of death||Not known|
|Height||5 ft 11 in (1.80 m)|
|Playing position||Right back|
* Senior club appearances and goals counted for the domestic league only.
Bonthron was born in Burntisland, Fife. He played for Raith Rovers and Dundee before joining Manchester United in May 1903. He helped them to promotion to the First Division in the 1905–06 season, and made a total of 134 appearances for the club in all competitions, scoring three goals. He was a combative player, and during the promotion season was at the centre of a serious incident after Manchester United's match at Bradford City. His treatment of Bradford player Jimmy Conlin during the match enraged the crowd, and after the game Bonthron was attacked by home supporters. Criminal charges followed against the perpetrators, and a Football Association (FA) inquiry resulted in the temporary closure of Bradford City's Valley Parade ground.
He joined Sunderland in May 1907, playing 24 games, before moving on the following year to Northampton Town, with whom he won the Southern League championship in the 1908–09 season. He spent the 1910–11 season with Birmingham before returning to Scotland with Airdrieonians and Leith Athletic.
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