The return to play following surgery on a fractured clavicle is extremely variable depending on where the location of the fracture is on the clavicle, whether it is displaced, and if it is comminuted (shattered into pieces) or not. If he had a single clean break with or without simple displacement in the mid clavicle (most common fracture site since it is the weakest), and if healing progresses well, the surgically supported bone can usually allow the player to return in ~6 weeks. If the clavicle fracture is in other locations, comminuted a rod or plate reconstruction is a more variable recovery and can be up to 3 months.
An American Journal of Sports Medicine study revealed that 94% of plated clavicular fractures (all types) returned to the same preinjury performance level. The mean time to return-to-sport was 68 days (range, 5-180 days). Nine (16.6%) of the cases returned to sports before 6 weeks after surgery, 40 (74%) returned between 6 and 12 weeks, and 5 patients (9.2%) returned 12 weeks after surgery.
Without knowing the exact facts behind the fracture and repair, we are left only with the reasonable possibilities of return anywhere from 6 weeks to 12 weeks. Dr. Chao's optimistic statement is based on the best case scenario.
*I'm also placing this post in the Injury Report thread.