[7] Kaladharan, who is a mechanical engineer, was posted in Jodhpur at the time of his son's birth and later moved with his family to Koramangala, Bangalore where he also worked on the sprinkler system at the M. Chinnaswamy Stadium.

[9] Born as a premature baby, Karun's parents were advised by the doctors to introduce their son to sports as part of the treatment for his weak lungs.

[10] Nair joined Koramangala Cricket Academy on 28 March 2001, a year after his family moved to Bengaluru and was coached under Shivanand.

[11] He studied at Chinmaya Vidyalaya, where his mother taught until fourth grade and switched to the Frank Anthony Public School for better cricketing opportunities.

He went through a lean patch in the 2014–15 season with a string of low scores but bounced back smashing 328 runs in the final[15] helping Karnataka to win the title again.

He was also India's second ever triple-centurion after Virender Sehwag, and only the third man in the game's history to convert a maiden Test ton into a triple.

[34] In 2016, Delhi Daredevils signed Karun[35] after Rajasthan was banned from the competition for two years after being found guilty in illegal betting and match-fixing probe.

[38] In February 2021, Nair was bought by the Kolkata Knight Riders in the IPL auction ahead of the 2021 Indian Premier League.

[40] In July 2016, Karun survived a boat accident in river Pampa in Kerala during a thanksgiving temple visit after making his ODI debut.