Fairbanks earned the save in Saturday's 4-3 win over the Rockies, striking out one in a perfect ninth inning.
Fairbanks was called on to protect a one-run lead in the ninth and needed just nine pitches to do so. He could be unavailable Sunday after notching saves on back-to-back nights, but the 32-year-old appears to have a firm grip on the closer's role following a strong start with his new club.