#1 Dale Steyn
South African pace spearhead Dale Steyn has not been at his best of late and injury is only adding to his woes. In the first Test of the ongoing home series against England at Durban, Steyn suffered a shoulder injury because of which he missed out on the 2nd Test at Cape Town.
There was a possibility of him being included to the team for the 3rd Test. However, Dale Steyn has been ruled out of it following the severity of his injury. Towards the end of 2015, South Africa's premier fast bowler had also missed 3 out of the 4 Tests against India on the due to a groin injury.
Keeping in mind his injury troubles in the past year or so, it is highly doubtful that South Africa will run the risk of including Dale Steyn in the World Twenty20 squad.