Danks is on the disabled list with a left shoulder strain and has been dealing with soreness in the shoulder. He is expected to undergo an MRI when the White Sox are in Chicago, Ventura said. Danks has said he'll see team doctor Gregory Nicholson on Monday in Chicago.
"Moving guys around with John not being able to go [Monday], instead of calling someone up, we're going to have Stew start [Monday]," Ventura said. "Gavin's actually available today. If we run into a glitch where we need some innings out of somebody, he can go back out there."
Stewart will be making his first start of the season, but he started 11 games last year, eight for the White Sox and three for the Blue Jays. He went 2-6 with a 6.00 ERA as a starter.
"It's nice. It's a change from what I've been doing," Stewart said. "But I've had experience doing it, so it's not going to be anything too surprising. [I'll] just try to go back in the same routine as last year and pick up from there."
Stewart will make his spot start in a lively crosstown series at U.S. Cellular Field.
"I'm real excited about it," Stewart said. "It should be a packed house. It's a big series."
Stewart's longest outing this season was 3 1/3 innings on May 22 against the Twins. He said he's unsure how deep he'll pitch into Monday's game.
"I feel I'm in pretty good shape right now," Stewart said. "I'm willing to go as far as they let me go."
With the way the rotation is set up, Sale is expected to pitch Friday on two extra days of rest. But Ventura said the White Sox aren't limiting the left-hander's innings to a certain amount. Sale is in his first season of starting.
"We're not getting caught up in putting an exact number on it," Ventura said. "I want him to go out and pitch without the mindset of he's going to get cut short at some point. I just want him to pitch and not worry about that he feels limited in any way."