He returned to Bristol in 2013, but was shut down with shoulder tendinitis after five games and missed the remainder of the season.
In 2019, pitching for the Charlotte Knights, Guerrero struggled to a 3–7 record with a 7.27 ERA, leading to his release on July 23, 2019.
[5] On July 28, 2019, Guerrero signed a minor league deal with the Miami Marlins and was assigned to the Double-A Jacksonville Jumbo Shrimp.
[9] Guerrero returned to action in 2021, pitching in 11 games (starting 9) and logging a 5.81 ERA with 27 strikeouts across 48.0 innings of work.
[11] On January 11, 2023, the Algodoneros traded Guerrero to the Tecolotes de los Dos Laredos in exchange for José Torres.