Alex Stik Castro Giraldo (born 8 March 1994) is a Colombian football player who plays as winger for Millonarios.
Castro began his career at Alianza Petrolera, debuting on 17 October 2013 in a 1âÂÂ0 Copa Colombia defeat Atlético Nacional as a 63rd minute substitute for Dairon Asprilla. He made his league debut three days later, again as a substitute, in a 2âÂÂ0 defeat to Cúcuta Deportivo. Castro scored his first senior goal on 9 April 2015, the opening goal in a 2âÂÂ2 league draw with La Equidad.
In June 2017, Castro completed a transfer to Deportivo Cali. He made his debut for the team on 8 July 2017 in a 4âÂÂ2 win over Envigado and appeared in a continental competition for the first a week later, in the second round of the 2017 Copa Sudamericana against Junior.
After half a season with Los Azucareros, Castro spent the next two campaigns on loan, returning to Alianza Petrolera in 2018 before another loan spell, this time to fellow Primera A team Deportes Tolima, in 2019. The loan deal contained the option to purchase Castro at the end of the season but in December 2019, Deportivo Cali released a statement announcing Tolima had declined the option. They did, however, admit that Castro's "future will be discussed" as he continued to express a desire to leave, particularly as he wanted to play abroad.
On 24 January 2020, Castro signed a three-year contract with Liga MX team Cruz Azul. On 21 January 2021, Castro returned to Colombia on a one-year loan with Atlético Nacional from Cruz Azul.
On 6 January 2021, Castro was loaned out to Uruguayan club Nacional until the end of 2022.
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