Career
He describes himself as "either an eight or a ten driving from midfield". Early years
Born in Lewisham, Udumaga began his career in the youth system at nearby club Charlton Athletic, before moving League Two side Oxford United in 2011 and signing scholarship forms in February 2012. He joined Premier League club Newcastle United on trial in 2012, before signing for Championship side Crystal Palace towards the end of the 2012-2013 season.
Brentford
Towards the end of the 2013-2014 season, Udumaga joined League One side Brentford on trial.
After impressing during four appearances for the Development Squad, he signed a one-year professional contract with the newly promoted Championship club in June 2014. After eight goals and almost as many assists for the Development Squad during the first half of the 2014-2015 season, Udumaga was rewarded with his maiden call into the first team squad for a league match versus former side Charlton Athletic on 14 February 2015, remaining an unused substitute the 3–0 defeat.
On 26 February, it was announced that Udumaga had signed a new one-year deal. Udumaga was called into the first team squad for three late-season games and finished the season as top scorer for the Development Squad, having scored 12 goals in 24 appearances.
Udumaga continued his involvement with the first team into 2015-2016 pre-season, being included in the squad for a training camp in Portugal in July and scoring in friendlies versus South Carolina (U.S.) Farense and Tottenham Hotspur.
He made his senior debut with a start in the League Cup first round versus former side Oxford United on 11 August, playing the full 90 minutes of the 4–0 defeat. A spate of transfers away from the club and an injury crisis saw Udumaga hold onto his place on the bench and he made three further substitute appearances during the following month. = Wycombe Wanderers (loan) On 26 November 2015, Udumaga joined League Two club Wycombe Wanderers on a one-month loan.
Despite failing to make an appearance, his loan was extended by a further month.
He made three further appearances before returning to Brentford when his loan expired.