He has previously played in Major League Baseball (MLB) for the San Diego Padres and Kansas City Royals.

[4] Bolaños split the 2019 minor league season between Lake Elsinore and the Amarillo Sod Poodles, combining to go 13–7 with a 3.66 ERA over 129 innings.

[7] He made his major league debut on September 3 versus the Arizona Diamondbacks, allowing two runs over six innings pitched.

[8] Bolaños made three starts and two relief appearances for the Padres in 2019 and ended the season with a 5.95 ERA and 19 strikeouts in 192⁄3 innings.

On July 16, 2020, Bolaños and Franchy Cordero were traded to the Kansas City Royals in exchange for Tim Hill.

[9] With the 2020 Kansas City Royals, Bolaños appeared in 2 games, compiling a 0–2 record with 12.27 ERA and 2 strikeouts in 3.2 innings pitched.