CC Sabathia got his right knee drained and a cortisone shot Saturday.

Now, the Yankees wait.

Sabathia was placed on the 10-day injured list with right knee inflammation, but whether his season — and therefore, his career — is over remains to be seen.

“I don’t know,” manager Aaron Boone said Saturday morning, when asked if the injury could jeopardize Sabathia’s season. “If it responds the way it normally does, then no, I think there’s a realistic chance that he would be back and could even be back pretty shortly. But we’ll just have to see how he responds in these coming days to the shot and to the draining.”

Sabathia left Friday night’s start against the Athletics after three innings, with his surgically repaired knee causing him pain again. The 39-year-old lefty said he hoped and planned to be back this season, but made no guarantees.

It marked Sabathia’s third injured list stint for his right knee this season. The first of those cost him 11 days, the second sidelining him for 21 days. After Saturday, the Yankees have 29 days left in the season, which Sabathia has said will be the last of his 19-year career.

“Last night was tough, just knowing he was in a lot of pain,” Boone said before the Yankees’ 4-3, 11-inning win. “You’re kind of fighting that. I have so much respect for this guy and what he’s doing and what he puts himself through and just the not, ‘Woe is me,’ the not, ‘Look at me and look at what I’m going through.’ He just competes.

“He’s a warrior, he really is. So there are a lot of emotions running through me as he’s coming out of that game where he’s performing. That last inning, he goes through the top of their order and I know he’s out there in a lot of pain and doing it on guile. So hopefully he’s able to get back for us and continue to be a contributor. But it has been tough, knowing that he’s gotta deal with this and still try to go out and get really good hitters out. It’s a challenge, I know.”

Jonathan Loaisiga was recalled from Triple-A Scranton/Wilkes-Barre to take Sabathia’s roster spot. The Yankees will need a starter for Wednesday’s series finale against the Rangers. They could opt for a bullpen game, and would have the arms to do so with rosters expanding Sunday.

As for whether Sabathia could be used in an abbreviated role upon his potential return, Boone said it was too early to speculate.

“Those things all become part of the pie depending on how he comes out of this, what he is, where we are as a club, is Sevy [Luis Severino] back in the mix?” Boone said. “All those things that have yet to play out. So yeah, everything’s on the table. First thing’s first, is getting this thing right and getting him back to a point where he’s able to pitch again. But we’re not there yet.”