It is understood that the assistant coach was unhappy that plans were disregarded during the mega auction
Katich, formerly the assistant coach (to Jacques Kallis) at Kolkata Knight Riders and head coach of Royal Challengers Bangalore, was present throughout the auction, sat alongside fellow support-staff members Tom Moody, Brian Lara, Muttiah Muralitharan and Hemant Badani, and is understood to have put in his papers immediately after the auction, which ended on Sunday, February 13.
At the auction, Sunrisers spent big on Nicholas Pooran (INR 10.75 crore, USD 1.43 million), Washington Sundar (INR 8.75 crore, USD 1.16 million) and Rahul Tripathi (INR 8.5 crore, USD 1.13 million). They also splurged on Romario Shepherd (INR 7.75 crore, USD 1.03 million) and the uncapped Abhishek Sharma (INR 6.5 crore, USD 866,000).
And prior to the auction, Sunrisers retained Kane Williamson, who is likely to lead the side if fit, as well as two uncapped Indians, Abdul Samad, a middle-order batter, and Umran Malik, a tearaway quick.
Matt Roller is an assistant editor at ESPNcricinfo. @mroller98