Soccer By Ives reported that Soumare had "successful arthroscopic surgery to fix swelling and lingering pain in the same knee he had surgically repaired earlier in the year." The online soccer news site also said that Soumare told SBI that he was no longer available for the 2012 Major League Soccer season.
The reason behind Soumare's inability to rehab his knee and recover from the March surgery in time to play regularly for the Union was due to the fact that he was working hard to get back into full fitness, according to SBI.
The Philadelphia Union acquired the contractual rights of Mali international from the Vancouver Whitecaps in exchange for allocation money and the team's 2013 first round SuperDraft selection. The center back managed to make only one start for the Union - an appearance that coincided with a 3-1 loss to the Fire - and barely made it into the club's gameday roster otherwise.