Once an athlete is symptom free for 24 hours the standard return to play protocol is:
Day 1: Light bike with standard computer test like impact, need to be at baseline to be cleared, large schools may have multiple of these tests
Day 2: harder bike
Day 3: running/agility/weights
Day 4: non-contract practice
Day 5: full practice
A couple of the days can be combined if you weren't sure it was an actual concussion.
In Morgan's case if he was held out as a precaution and placed in protocol to be safe, which is a possibility on what Fleck has said, he would not be practicing yet but would be ready for game Saturday. As others have said every case is very different, so we will see Saturday.