It was Smith's first 20-plus point playoff game since 2013 when he scored 29. Smith, who also went 3 of 6 from the free throw line, added six rebounds and three assists to his totals.
He and the Rockets will look to close out Dallas in Game 5 Tuesday.
Gortat shot eight of nine from the floor and also added two steals and a block in the win.
"I guess I'm the weakest link out there, so they're going to leave me open a lot," Gortat said. "One day, if I'm going to play a perfect game, I might crack the Wilt Chamberlain record of 100 points."
Love still must undergo an MRI on Monday, but the report says that sources within the organization feel the injury is severe enough to keep Love sidelined for a while.
Love felt that Celtics forward Kelly Olynyk deliberately injured him during the game.
Felton tweaked his hamstring in Game 3 and did not return after playing 13 minutes. Jefferson has been dealing with a toe injury but has played in all three games of the series thus far.
The Mavericks are 3-point underdogs.
Barnes started in the Clippers' Game 4 win on Sunday, scoring four points in 23 minutes.
"I have no doubt in my mind that he did it on purpose," Love said about Olynyk.
"Things got a little chippy," Cavs guard Kyrie Irving said after the game. "I think it was a shared feeling that it just wasn’t a basketball play."
Crowder was fouled hard by Cavaliers guard J.R. Smith, who was ejected as a result.