On 1 October 2014, Mendoza signed for Chennaiyin of the newly founded Indian Super League. He made his debut for the team, captaincy by Marco Materazzi, two weeks later in a 2–1 away win over FC Goa, replacing marquee player Elano for the final 23 minutes. On 28 October, he scored his first goals in the league, a first-half brace in a 5–1 rout of Mumbai City at the Jawaharlal Nehru Stadium. He added a third on 11 November, equalising for a 1–1 draw at FC Pune City, and a fourth eight days later in a 3–1 win over the same opponents. He finished the season with four goals from nine games as Chennaiyin won the regular season, but was absent through injury as they were eliminated in the semi-finals of the 2014 Indian Super League playoffs by Kerala Blasters.
On 19 December 2014, Mendoza returned to South America, joining Brazil's Sport Club Corinthians Paulista on a four-year deal. He made his debut on 8 February 2015 in the Paulista Derby against Palmeiras, starting in a 1–0 away win for the season's Campeonato Paulista. Seventeen days later, he scored his first goal for the Timão, opening a 2–0 win at Clube Atlético Linense, his only goal in seven regular season appearances. On 19 April, in the knock-out stages, he scored in the 2–2 home semi-final draw against Palmeiras, which his team lost in a penalty shootout.