He made his professional debut in 2018 with the Dominican Summer League Nationals, posting a 3.60 ERA across 14 relief outings.
[3] He returned to action in 2021 with the rookie–level Florida Complex League Nationals, pitching to a 2.78 ERA with 47 strikeouts in 17 games.
[4] In 2022, Ferrer split the season between the Double–A Harrisburg Senators, High–A Wilmington Blue Rocks, and Single–A Fredericksburg Nationals.
He made 48 combined appearances between the three affiliates, recording a 2.48 ERA with 78 strikeouts and 11 saves across 65+1⁄3 innings of work.
[10] Ferrer was placed on the 60–day injured list to begin the 2024 season after suffering a strain in the teres major muscle in his right shoulder.