With first choice goalkeeper Paul Jones sidelined with a knee injury, Exeter City moved to sign a replacement and strengthen their link with Tottenham Hotspur as Oscar Jansson arrived on loan in September 2009. He appeared in seven matches and, after failing to establish himself in the English game, moved back to Sweden and won an international cap.

Oscar joined Spurs in January 2008 from Karlslunds IF playing initially for the under-18 before progressing to the reserves. Later in 2008 he took part in the first team’s tour of Spain before playing in other pre-season friendlies against Leyton Orient and AS Roma. Oscar later sat on the bench for the UEFA Cup games against Shakhtar Donetsk in February 2009. 

However, Oscar’s first taste of senior football came with his loan to Exeter City commencing with the 3-0 defeat at Gillingham on 5 September 2009. He then returned to Brisbane Road, where he had played for Spurs in that pre-season game, for a 1-1 draw the following week before continuing his stint with the Grecians with another five games up to and including the game at Huddersfield on 10 October 2009.

On returning to White Hart Lane, Oscar was never to have a first-team opportunity and spent the rest of his time at Spurs either playing for the reserves or making appearances on loan for Northampton, Bradford City and Shamrock Rovers. By the time he left Tottenham in December 2012 Oscar had appeared sixteen times in English senior football with seven of those games being for Exeter. 

Returning to Sweden Oscar was to play over 200 times for Örebro SK between 2013 and 2020 winning one full cap for Sweden in a 2014 friendly against Iceland in Abu Dhabi. He later signed for Norrköping in January 2021 and was an ever-present in both 2021 and 2022, remaining with the club in 2023.