The team said VanVleet suffered a "partial ligament injury" during Saturday's game.
Calderon, who played the first seven-and-a-half seasons of his National Basketball Association career with the Raptors, now plays for the Detroit Pistons.
Leonard shot 4-of-15 for 11 points in a 104-99 Raptors win.
Star point guard Jeremy Lin is slated to reinforce the Toronto Raptors to push their playoff chances.
Lin has played 457 career National Basketball Association games with Golden State, New York, Houston, the Los Angeles Lakers, Charlotte, Brooklyn and Atlanta with averages of 11.8 points, 2.8 rebounds, 4.4 assists and 1.1 steals a contest.
Assassin's Creed Odyssey New Game Plus Mode is on its Way
You can also pick up the original game on Steam at a 75% discount as part of the Steam Lunar Sale. The remastered version will release this March 29th on Xbox One, PS4, and PC.
"He hasn't played in a while, so we'll be conscious of that going into a back-to-back", said Bickerstaff of Valanciunas.
"We were playing in NY and you could already feel that energy", Gasol said. "That's what you want from an organization that you're playing for". The three-time All-Star was a stalwart of Memphis' "Grit and Grind" era that saw the club make seven straight playoff appearances, including the Western Conference final in the 2012-13 season.
Marc Gasol will be making his debut with the Toronto Raptors on Saturday night against the New York Knicks, and a deep postseason run with his new club is breathing new life into the 34-year-old center.
"It's more about easing him in", Nurse said.
For the first time in his career, Gasol is coming off the bench for a Raptors team that's stacked with talent. "Memphis fans - we get some fans in the stands - but not as many as you guys, or "us" now".