At first, it had appeared that Kris Dunn had somehow avoided a concussion in his scary fall late in Wednesday's Bulls loss to the Warriors.
But that is no longer the case, as Dunn has been diagnosed with a concussion:
After a second round of tests, Kris Dunn has been diagnosed with a concussion, according to sources. As of now he won't be traveling with the team and will be evaluated at a later date
— Vincent Goodwill (@vgoodwill) January 18, 2018
The Bulls confirmed it the day after Fred Hoiberg said he wasn't sure if Dunn had suffered a concussion.