Worst Day in Chicago Sports History?

I was watching the Blackhawks game last night and saw Patrick Kane's injury. Looks like he broke his collarbone, or injured his shoulder very badly. They're calling it an upper-body injury, but I suspect he may be out for the season. (We'll find out more in the next day or two)

UPDATE: He's out 6-10 weeks, and the playoffs start in 7 weeks.

And then the scroll under the game announced that Derrick Rose had ANOTHER knee injury, and will have ANOTHER surgery. He may be finished entirely. (This is starting to feel like Gale Sayers all over again)

Two superstars in one day. Has there been a worse day in Chicago sports history?