“We got some guys out right now, so guys got to step up,” Nunn said in advance of Saturday night’s road matchup against the Nets. “We have a deep roster, so anybody can get it going at any time. When your number is called, you just have to be ready.” Nunn has done exactly that and more, as he entered Saturday’s game against the Nets averaging 22.7 points while shooting 58.1 percent from the field and 44.4 percent on threes, 5.7 rebounds, 4.3 assists and two steals off the bench for the shorthanded Heat in the last three games.