Meanwhile, the injuries keep piling up for the slumping SuperSonics.
With the Mavericks missing Nowitzki for most of the night, Dampier matched a season high with 22 points and grabbed a season-best 16 rebounds in Dallas' 103-95 win over Seattle on Wednesday.
Dampier's domination inside was needed after Nowitzki sprained his left ankle late in the first quarter and had to be carried to the locker room after scoring only six points.
"We challenged (Dampier) at half to step up and he did," Johnson said. "Then we just had efforts from everybody."
Nowitzki went down with 2:05 left in the first. Seattle's Chris Wilcox jumped for the rebound of a missed free throw by Jerry Stackhouse and was bumped by DeSagana Diop of the Mavericks. Wilcox fell to the ground, his legs spreading and his left foot hitting Nowitzki just above his left foot, causing his ankle to roll.
Nowitzki was down on the floor for a few minutes, but X-rays were negative. He was to be re-examined in Dallas, and Johnson said Nowitzki was day-to-day.
"Whenever this happens, at first it scares you, but I've done this before," Nowitzki said. "The docs have told me it's just a sprain and that I'll be OK."
Down the hallway, Seattle was lamenting yet another major injury. Lewis injured a tendon on the back of his right hand after his fingers got caught in the net while he was trying to block Dampier's shot in the opening minute of the game.
Lewis immediately ran to the locker room and had X-rays taken. He was to be re-examined on Thursday.
Seattle was already without leading scorer Ray Allen, who missed his ninth straight game with a right ankle injury. Adding another name to the injury list, Wilcox missed the final 9:39 of the fourth quarter after taking an elbow to the jaw and needing stitches in his lip.
"I couldn't be prouder," Seattle coach Bob Hill said. "They fought tooth and nail for a long time. We got great effort from everyone who stepped on the floor."
But effort couldn't carry the Sonics, who wore down in the second half thanks to stingy defense by the Mavericks. Dallas won its fifth straight, holding Seattle to only 39 points and 36 percent shooting in the final 24 minutes. Jason Terry added 17 points as five Mavericks finished in double figures.
Dallas also outscored Seattle 29-7 at the free-throw line. Dampier made eight of nine free throws and grabbed nine offensive rebounds
"I think everyone took the defensive challenge to go out in the second half and get the job done," he said.
Luke Ridnour led Seattle with 21 points before fouling out. Reserve guard Earl Watson and Wilcox each scored 18, but Seattle lost its sixth straight overall and had a four-game home winning streak snapped. It's the fourth time in the last five seasons the Sonics have lost six in a row at one point.
After trailing by 11 at halftime, the Mavericks erased most of the deficit by the end of the third. Dallas went on a 12-0 run, including a four-point possession that included a three-point play from Dampier and a technical foul free throw from Terry after Hill argued with officials.
Devean George's 3-pointer with 2:46 left in the quarter gave Dallas its first lead since 12-10. Seattle retook the lead at the end of the third, but Dallas started the fourth on a 9-4 spurt and never trailed again. The Mavericks closed out the struggling Sonics with a 10-0 run as Seattle went more than three minutes without scoring.
"We really did a good job of putting defensive pressure on them," Stackhouse said. "We made them take bad shots and they got a little tighter as the game went on."
- Dallas got G Anthony Johnson back after he missed the previous three games with a sprained right ankle. Johnson scored two points in five minutes.
- Wednesday was the 40th anniversary of Seattle being granted an NBA franchise.