San Francisco quarterback Jimmy Garoppolo, who has played just one half of football the past three weeks due to a right ankle injury, declared himself ready to start Sunday night against the visiting Los Angeles Rams.

After missing two games, Garoppolo returned last week to face the Miami Dolphins, but he struggled and was pulled at halftime with the team down 30-7.

Garoppolo has worked through all three practices this week for the 49ers (2-3).

"As far as the ankle, it's feeling great this week, it really is," Garoppolo said Friday. "Made a lot of improvements, just that couple extra days I think consistently get (the ankle) better. So, just one of those things you have just got to keep working at it."

Niners coach Kyle Shanahan also gave Garoppolo a thumbs-up for being fully ready to oppose the Rams. The team's regular quarterback will be back under center after being replaced by C.J. Beathard during the Dolphins game.

Garoppolo completed 7 of 17 passes for 77 yards and was picked off twice by Miami. Beathard went 9 of 18 for 94 yards and a touchdown to close out San Francisco's 43-17 loss.

"I'm not thinking about the ankle and I don't think (Garoppolo) is going into the game," Shanahan said. "I think you try to get to a point where you're healthy enough to play, which a lot of guys are at but a lot of guys have injuries they've got to play through. ...

"I think Jimmy's in a better spot this week than he was last week, so I don't think about the ankle in that case. I expect him to go out and play well and that's how I'll judge him."

On the season, Garoppolo is 40 of 66 for 467 yards with four touchdowns and two interceptions. He is 1-2 as a starter this year after guiding San Francisco to a 13-3 mark and a Super Bowl berth last season.