The Dodgers took a gamble when they decided not to aggressively add pitchers at the trade deadline. They were betting that most of their injured starters and relievers would be back in time for the postseason, and trusting that the healthy arms would be able to hold down the fort until then.
The second part of that plan has worked out a little dubiously, but the first part is actually sort of unfolding the way they envisioned. Blake Snell returned to bring the rotation to six and looked great in his last outing against the Blue Jays. Roki Sasaki, the last major question mark this season, doesn't seem to be too far behind him now.