Source: Kurt Helin, NBC Sports 
Chicago has finally started to find a groove — a five-game win streak where their defense has been the best in the NBA (85 points per 100 possessions) and their offense has been good enough (14th in the league in that time).
Now, the basketball gods have thrown another hurdle in the Bulls way.
Starting two guard Jimmy Butler is out with a sprained right big toe — better known as turf toe — and not with the team as it heads out on a six-game road trip, the team announced after getting a look at the MRI results.
Butler is a key part of the defensive glue for the Bulls but he contributes on both ends.
With Butler out there will be a lot more Kirk Hinrich and Mike Dunleavy in the rotation, but that’s a healthy drop off.