Brebbia will start Friday's game against the Marlins, Evan Webeck of The San Jose Mercury News reports.
The 32-year-old will take the mound on short notice for his first career start Friday after Alex Cobb (back) was a late scratch. Brebbia hasn't pitched more than two innings in any of his first 22 appearances of the season, and he's unlikely to have a significant pitch count during Friday's bullpen game.