So at a minimum, Derrick Rose will miss the rest of this season and almost certainly the start of next season. A groin injury no longer seems so bad. The worst thing about the injury is there's no telling just how much it will affect the Bulls. At a minimum, they've lost any realistic shot at the title this year.
The downside is much, much worse
For an athlete like Derrick Rose who relies on his explosiveness, to tear an ACL can be a career changer. Typically the recovery time for an ACL is nine months to a year, and many people never come back. Fortunately, the recovery from ACL surgery has come a long way in the past decade.
It used to be that when an elite athlete tore an ACL they rarely came back the same. The injury certainly isn't the death sentence it once was. Also, the recovery from any injury is always easiest when you're under 26, so Derrick stands a very good chance at completely recovering.
The bad news is that the Bulls chances at the title this year are effectively over, and their odds for next season are going to be significantly reduced as well as even if Rose comes back towards the end of the season, he likely won't have regained his explosiveness by the playoffs.
There's also some chance that this is a complete career changer, and Rose never comes back to play at the same level he played at in the past. In the worst case scenario, this injury could effectively end Rose's run as a top five player in the NBA.
While we'll analyze the roster more in the off-season, it immediately becomes clear that C.J. Watson's non guaranteed contract will be picked up. The Bulls will also likely need to find another PG for next season as Rose will likely miss at least half the season and play at a sub par level the other half.
Get well Derrick. It's a crushing injury for the entire city of Chicago, but I feel for Rose who's a tremendous competitor who's gone through so much this season.