San Francisco 49ers quarterback Jimmy Garoppolo is bullish that he can play through his right thumb injury in Sunday's game against the Houston Texans.

The 49ers are 8-7 in the NFC West and can secure a playoffs berth with victory against the Texans.

Garoppolo, who will be a key part of their postseason bid, only threw under supervision at the team's Wednesday practice but said he was "definitely" a chance to play.

"I played the entire game with it basically, so it's really just about being able to grip the ball and do the things I normally do and we're gonna go test those out today, see how it feels and go from there," Garoppolo told reporters. "But I feel confident in it."

Garoppolo had missed the 49ers' bonus practice on Monday as he waiting for swelling in the thumb to subside.

"We'll see how it looks today," Garoppolo added on Wednesday. "If it looks good, it looks good. If it looks bad, it looks bad.

"It's just one of those things that you have got to test it out and go through it. Until we do that, it will be hard to say. But we'll all be on the same page and we'll do the right thing for the team."

The 49ers QB continued: "It's a torn ligament so it is what it is. The pain, it's not going anywhere so I know what that feels like but it's just about being confident and going out there and being able to do what I normally do with the football. We'll see where it gets us but I feel good right now with it."

Garoppolo has a completion rate of 68 percent this season for 3,494 yards with 19 touchdowns and 10 interceptions across 14 games.

If Garoppolo is not deemed fit, rookie Trey Lance will be in line to make his second NFL start having filled in against the Arizona Cardinals on October 10.