Johnson played for more than 16 minutes off the bench in the Rockets' win on Sunday, more than he had in the six games combined he's played in since Jan. 2.
“Nick’s a guy we’re going to play some,” McHale said. “We’re going to have to. We’re down on bodies. I’m comfortable with Nick."
Rivers coached Rondo for seven seasons before stepping down and taking over the Clippers in 2013.
"I didn’t know [if Rondo was going to be part of Boston's future]," Rivers said. "I think at the end of the day, it was more of a Rajon decision, in my opinion ... it was more his decision than [team president Danny Ainge) and the Celtics' staff."
The Celtics acquired forwards Jae Crowder and Brandan Wright, guard Jameer Nelson and a pair of future draft picks in the trade with the Mavs.
"I just think you get a feel for whether [Rondo] wanted to play it out [in Boston] or not, and when you're rebuilding you can't take that gamble of letting an asset out of the door and letting him become a free agent," Rivers said.
Morris also collected seven rebounds in the defeat.
Westbrook was 10 of 29 from the floor and also picked up three steals in the win.
Along with eight rebounds, Wall tallied 12 assists and was 11 of 12 from the free throw line.
Harden also added an important block for the Rockets. "I was surprised he got up there," Rockets teammate Dwight Howard said. "He's not known for blocking shots. That's what MVPs do."
Parsons also collected 10 rebounds in the loss.
Miles went 9 of 12 from the floor, including 5 of 6 from 3-point range.
Randolph shot 9 of 16 from the floor in the loss.
The 25 points was Leonard's second-highest total of the season.
"He was rolling and he felt it," said Spurs coach Gregg Popovich on Leonard's fourth-quarter performance.
Leonard also recorded his 18th straight game with at least one steal.