INDEPENDENCE, Ohio -- JR Smith didn't score in Game 4 and Raptors coach Dwane Casey thought his lineup changes made it harder on Smith.

And that may be so. But coach Tyronn Lue also said Smith was sick on Saturday and wasn't even supposed to play.

"He missed shootaround, well, he came into shootaround he was sick yesterday and he wasn't supposed to play, but he came in and gave us his best effort, which is big," Lue said.

The Cavs won the game, 105-103, on LeBron James' last-second shot, and now lead this series 3-0. They can finish a second consecutive sweep of the Raptors in the conference semis on Monday at The Q.

Smith logged 26 minutes and attempted two shots in Game 3. He was widely credited with defending Raptors All-Star DeMar DeRozan, who shot 3-of-12 for eight points and didn't play in the fourth quarter.

Smith was limited by foul trouble (four total) and his undisclosed illness (Smith said Friday he wanted to maybe play 27 holes of golf, so, who knows, maybe too many bogeys?). Lue said Jeff Green also made it tough on DeRozan, Lue said.

Casey played Fred VanVleet with his starters and brought Serge Ibaka off the bench. He said VanVleet's presence mitigated Smith (who had scored 20 and 15 points in the first two games of this series), and Ibaka challenged Tristan Thompson (no points, three rebounds).

"We got what we wanted," Casey said.

Meanwhile, Rodney Hood hasn't scored a point in this series, and Jordan Clarkson continues to struggle with the pressure being applied by the Raptors' guards. Lue said he and his staff had discussed introducing rookie Cedi Osman and veteran point guard Jose Calderon to replace or help Hood and Clarkson.

"You don't want to take guys' confidence throughout the playoffs because you're going to need everyone," Lue said. "We will just see how it goes."