Colorado opens September hosting San Francisco in a rookie duel: Kai-Wei Teng vs Chase Dollander. The Rockies sit one loss from 100 and three wins from avoiding the worst 162-game season, with 25 games left. Drew Romo and Ryan Rolison were promoted as September rosters expand in a bid to spoil the Giants’ wild-card chase. Dollander has shown flashes but command issues persist; Teng will try to steady a Giants lineup aiming to stay in the playoff mix.