The 26-year-old Butler suffered a knee injury in early February which sidelined him for a game. However, the Bulls allowed him to play through it two nights later, which is when Butler re-injured his knee on a drive to the hoop against the Denver Nuggets. He would leave that game in a wheelchair.
After the second injury, Butler sat out a month before returning over the weekend to face the Houston Rockets. Despite just coming off injury, Butler drew the impossible task of checking James Harden and wasn't held to a minutes limit. He would end up playing 34 minutes - four off his league-leading average of 37.8 - before fouling out.
The two-time All-Star is Chicago's best player, and leads the team in scoring with 22.4 points per game along with 5.3 rebounds and 4.3 assists. The Bulls are 5-9 in Butler's absence.
Entering Wednesday, Chicago sits a half-game up on the Detroit Pistons for the eighth seed.