Another lengthy lay-off for Watson
The inspirational leader has been a peripheral figure for the past two seasons because of injury.
The Kings have been struggling to build momentum and Watson's presence would have been a huge lift for the men from the windy city.
The Kings have released their latest injury report on Monday.
Wing Siyanda Grey is the only new injury concern after the weekend's 9-20 loss to the Pumas in Nelspruit.
He has torn his hamstring and the severity of the injury will be assessed later on Monday.
Shane Gates is still recovering from a fracture of his fifth mata-tarsal in his right foot.
He will have an x-ray done later this week to assess his healing progress.
Aidon Davis will be out for seven months after having an operation for a tear of his right knee.
Gary van Aswegen and George Whitehead both had knee surgery and will be out for three months and four weeks respectively.
Cameron Lindsay will have surgery on his knee, but the date for the procedure is yet to be confirmed.
Ronnie Cook should be back within two weeks after fracturing his toe.