The Bulls bounced back with fury in Game 6 however, beating the Bucks by a playoff record 54 points winning the series 4–2. The next round saw the Bulls facing their arch-rival Cleveland Cavaliers, and their biggest nemesis, LeBron James, who had beaten the Bulls in all three of their previous playoff meetings. The Bulls shocked the Cavs in Game 1 dominating them and never trailing. The Cavs answered back in Game 2 in the same fashion, never trailing the entire game. In a pivotal Game 3 in Chicago, the Bulls and Cavs battled closely all the way through, but the Bulls prevailed on a last-second buzzer beating 3-pointer by Derrick Rose. In Game 4, the Cavaliers would answer once again, with LeBron James hitting the buzzer-beating shot to win the game. The Bulls lack of consistency and poor offensive showing doomed them once again as the Cavaliers won the next two games handily and closed out the series 4–2. After the series, speculation erupted about Tom Thibodeau's job security due to escalating feud between Thibodeau and Bulls front office managers Gar Forman and John Paxson. On May 28, 2015, the Bulls fired Tom Thibodeau to seek a "change in approach". The Bulls named Fred Hoiberg as their head coach on June 2, 2015. The Bulls had only 1 draft pick in the 2015 NBA draft, and selected center Bobby Portis from the University of Arkansas. Bulls forward Mike Dunleavy Jr. was ruled out for at least the first four months of the season after completing back surgery. With Dunleavy out indefinitely, the Bulls promoted Doug McDermott to the starting lineup in his place at small forward. Before the season started, coach Fred Hoiberg made an incredibly controversial move by putting Nikola Mirotić as his starting power forward to pair with center Pau Gasol, meaning Joakim Noah, a long-time Bulls veteran and a fan-favorite was to come off the bench. Hoiberg told the media that the move was suggested by Noah himself but Noah denied having made any suggestions to Hoiberg, which sparked a distrust between the two before the season even began. The Bulls started the 2015–16 season off well with an impressive season-opening 97–95 victory against archrivals and defending Eastern Conference Champion Cleveland Cavaliers and jumped to an 8–3 record in the first month. The Bulls went 10–9 and through late November and December. The Bulls came back and won six straight games. However soon afterwards, they lost 12 of their next 17 games and Butler missed four weeks after injuring his knee.