[6] Rojas made his professional debut in 2017 with the Quad Cities River Bandits and also played in four games for the Fresno Grizzlies.

He began 2018 with the Buies Creek Astros and, after one month, was promoted to the Corpus Christi Hooks, where he earned Texas League All-Star honors.

[11][12] On July 31, 2019, the Astros traded Rojas and fellow prospects Corbin Martin, Seth Beer, and J.

[21] On July 31, 2023, the Diamondbacks traded Rojas, Dominic Canzone, and Ryan Bliss to the Seattle Mariners for closer Paul Sewald.

[22] Rojas played second base for the Mariners for the rest of the season, batting .272 with 4 home runs in 46 games to close out 2023.

Rojas went back across the diamond to third base in 2024, as former teammate Eugenio Suárez was dealt to his former club, the Diamondbacks.