Career
Independiente
Sosa began his playing career in 2005 with Independiente. He made his league debut on 20 March 2005 in a 2–1 away defeat to Boca Juniors. In 2006 he had a loan spell with San Martín de San Juan but returned to the Independiente where he played until 2009 making 80 league appearances and scoring 13 goals.
During the 2009 winter transfer window he joined Argentinos Juniors under new manager Claudio Borghi where he started well with 3 goals in his first 6 games for the club
Gaziantepspor
Sosa was given the number 18 shirt at Kamil Ocak Stadium. He made his first Süper Lig appearance on 13 July 2010, in Gaziantepspor"s fourth game of the season, in the match away to Kasımpaşa.Sosa scored his first league goal for Gaziantepspor against Bucaspor.
Universidad Católica
On 7 January 2013, Sosa joined Universidad Católica. Universidad Nacional Autónoma de México
On December 26, 2013, Sosa was transferred to Mexican club Club Universidad Nacional.
Sosa had limited game time in his first tournament, scoring just 2 goals, but the return of Memo Vazquez saw an increase in opportunities resulting in an increased goal tally year on year.
Sosa scored 5 goals in his second tournament with the club and found the Netto 7 times in his third tournament, the Clausera 2015. The Apertura 2015 saw Sosa become the star man for Pumas and became only the 5th pumas player to score 10 or more goals in the short tournament format, scoring 10 goals. Sosa also added 7 assists during the regular season.
On December 9th 2015 Club Universidad Nacional tied Sosa down for another 3 years to the club
A fine run of form in the Copa Libertadores saw Sosa scoring again in a 0-2 victory at Olimpia followed by a brace against Deportivo Tachira in Ciudad Universitaria. Sosa was picked to join the Argentina Under-20 squad for the 2007 South American Youth Championship in Paraguay.
Argentinos Juniors.