Pinell debuted on 13 February 2021 with the Primera División club Alajuelense. Her club won the Costa Rican league title in the 2021 and 2022 Apertura and Clausura seasons.[1][2]
Pinell participated in the 2022 UNCAF Women's Interclub Championship, where she debuted on 11 September 2022 against Jewel Fury in which she was lined up as a starter in a 11–0 victory, offering a goal at the 52nd minute. Alajuelense was on top of group A with 9 points, advancing to the final. On 17 September, they faced Deportivo Saprissa [es], where they won 1–0, earning them their first international title.[3][4][5] On 18 December 2022, they won the Clausura 2022 final, becoming four-time champions, after beating Sporting F.C. [es] with a score of 4–3.[6][7]
International career
As captain of the Costa Rican U20 squad, Pinell took part in the 2022 FIFA U-20 Women's World Cup and played in all group games, at the end of which her team was eliminated without a point. She scored the team's only goal at the tournament in her first game,[8][9] a long-distance free kick that subsequently went viral internationally.[8]
On 26 August 2022, Pinell was called up by the Costa Rican team for two friendly matches against Colombia. On 3 September 2022, she made her senior debut with the Costa Rican team against Colombia, entering at the 65th minute, the match ended with a 1–0 loss.[10] In her second friendly match against Colombia, Pinell entered at the 72nd minute; her team also lost that match, 2–0.[11]
On 6 July 2023, Pinell was called up to the 23-player squad to play the 2023 World Cup.[12][13]