Colón Born in
Tostado,
Santa Fe, Alario began his career at
Colón in his native
province. He made his
Argentine Primera División debut on 11 June 2011, as a 59th-minute
substitute for
Cristian Raúl Ledesma in a 0–1 home defeat to
Arsenal. His first goal for the club came on 22 March 2014, a fourth-minute
penalty for the only goal of a win against
Tigre at the
Estadio Brigadier General Estanislao López. On 12 May 2015, he netted twice in a 3–2 away win at
Defensa y Justicia for Colón's first away win of the season.
River Plate On 26 June 2015, Alario became
River Plate's fourth signing of the season, joining the
Buenos Aires-based club on a four-year contract for a fee of 2.25 million US Dollars. He made his debut on 11 July, replacing
Fernando Cavenaghi for the final 30 minutes of a 1–1 home draw against
Temperley. Eleven days later, as a substitute, he equalised for a 1–1 draw away to Paraguay's
Club Guaraní in the second leg of the
Copa Libertadores semi-finals, converting a pass from
Tabaré Viúdez to send River through 3–1 on aggregate to their first such finals since
1996. On 5 August, in the second leg of the final after a goalless first, he finished
Leonel Vangioni's cross at the end of the first half to open the scoring as his team won 3–0 against
Tigres UANL. Eighteen days after River won the continental championship, Alario was sent off in a 2–1 domestic loss to
Estudiantes de La Plata. His first league goals for the
Millonarios came in the form of a hat-trick on 6 September, in a 4–1 win away to
Nueva Chicago. On 31 October, as a 55th-minute substitute for
Nicolás Bertolo, he scored the only goal in a win at
Vélez Sarsfield. On 16 December, in the semi-finals of the
2015 FIFA Club World Cup in
Osaka, Alario headed the only goal to defeat
Sanfrecce Hiroshima. Four days later he played the entirety of
the final, a 3–0 loss to
FC Barcelona. On August 25, 2016, Alario scores again finishing the game and yet another international title with
River Plate in Buenos Aires to take over
Recopa Sudamericana 2016. He was rated by many football experts in Argentina as the best striker playing in Argentina.
Bayer Leverkusen On 22 September 2017, Alario signed for German
Bundesliga side
Bayer Leverkusen on a five-year deal. On 2 August 2021, he extended his contract until 2024.
Eintracht Frankfurt On 24 June 2022, Alario signed a two-year contract with
Eintracht Frankfurt.
Internacional On 4 January 2024, Alario moved to Brazil, signing a two-year contract with
Campeonato Brasileiro Série A club
Internacional. ==International career==