Butler in starting lineup for Game 4
Butler didn't return for the second half of Saturday's contest due to right knee inflammation. He missed one game earlier in the postseason with the same injury.
Miami listed him as questionable Sunday.
Butler is having another terrific playoff campaign, averaging 28.1 points, 7.2 boards, 4.9 assists, and a league-leading 2.2 steals over 13 postseason appearances.
The Heat suffered a 102-82 loss in Game 4 to even up the best-of-seven East finals at 2-2.