Brebbia has made the Giants' Opening Day roster, Maria I. Guardado of MLB.com reports.
After making at least 45 appearances in each of his first three major-league seasons with the Cardinals, Brebbia spent 2021 with the Giants and made just 18 relief appearances with a 5.89 ERA and 1.58 WHIP in 18.1 innings. He's expected to work in middle relief for San Francisco.