With a 6 – 3 victory over Baltimore, the Tampa Bay Devil Rays become only the second expansion team in major league history to sweep a four-game series on the road. The 1993 Colorado Rockies, who did it against the Los Angeles Dodgers, are the other team to accomplish this feat.

On May 18, 1998 — With a 6 – 3 victory over Baltimore, the Tampa Bay Devil Rays become only the second expansion team in major league history to sweep a four-game series on the road. The 1993 Colorado Rockies, who did it against the Los Angeles Dodgers, are the other team to accomplish this feat.

Source:
Baseball Reference May 18