Career
After playing in their youth team, Umunegbu made his official debut for Milan in a Coppa Italia game against Catania on 20 December 2007, coming off the bench at half time. Foreign the 2008-2009 season he was loaned out to Serie B club Salernitana. He left the club after only six months, due to lack of playing time, and was subsequently loaned to Prima Divisione side Portogruaro.
The following season he was sent on loan to Varese, but finished the season with no league appearances.
At the start of the 2010-2011 season he was loaned out again, this time to Seconda Divisione club Renate. At the beginning of the 2011-2012 season, Umunegbu signed for Chiasso on a free transfer, but during the January transfer window he came back to Milan as they needed a player to fill in their second non-European Union spot, which otherwise would have been lost.
On 26 July 2012, Umunegbu signed for Bologna on a free transfer. However the deal also cost Bologna €175,000.
Umunegbu immediately transferred to Belgian club Boussu for free.