First off thanks to all the Baseball fans for providing well wishes.
Secondly, It's a blow and that assumes he can come back in 2021 (yes I know it's 2020 but usually it takes a full year to regain)
Thirdly, it's time for Hahn and his team to decide if the window still opens in 2019 by signing any number of free agents. Of all the teams in baseball, the White Sox are right at the top as an organization from pieces on the MLB roster, minor league depth, and payroll flexibility. Hahn could do his own version of the Miami Heat/Golden State Warriors and still have a payroll right at $120 million. He could go after one of the top guys, resign Shields and still have a payroll around $60 million with the window opening a bit ready to be flung wide open in 2020.
Bottom line. Injuries happen. You do not avoid a pitcher because they might get injured and be out 12-24 months. You keep up the depth and some will go by the side and others will excel.
While it hurts, I still believe in the plan. I believe that Hahn knows what he's doing and until shown otherwise, I'm All In.