In 1991, during an international competition, Arocha defected, opting for a life in the United States and the chance at playing in the Major Leagues.

[2] His story became known across the States when Hispanic media began talking about him, and Arocha was the subject of many television reports on Telemundo and Univision.

After missing the entire 1996 season with injuries, he was dealt as a player to be named later to the San Francisco Giants in a deal to acquire catcher Tom Lampkin.

Arocha returned to the majors with the Giants, pitching ten innings and posting an 11.32 ERA before earning his release on August 6, 1997.

Arocha finished his professional career with the Houston Astros' Triple-A affiliate in New Orleans in 1998, posting a 5–4 record and a 5.45 ERA in 11 starts.