According to ESPN, Cejudo needed surgery on the subscapularis muscle, which is the busiest muscle in the shoulder. The prognosis says that he’ll be back to training in four to five months. That’s late October to late November, so early 2020 seems like a logical return time to the Octagon, barring any setbacks.
It was noted that Cejudo suffered a leg injury just prior to the Moraes fight as well. But he won’t need surgery on that.