Jones said he aggravated a previous knee injury in Sunday's win over the Cardinals, Ian Rapoport of NFL Network reports.

EDGE Analysis

Jones said he dealt with a sprained PCL over the summer and aggravated it in the second half of Sunday's victory. Jones was able to stay in the game and finish the contest with a knee brace. With Brock Purdy (shoulder/toe) nearing a return, potentially as soon as Week 4 against the Jaguars, Jones may get time to heal. Adrian Martinez is next up on the depth chart as the Niners' QB3.

Jones will start Sunday's game against the Cardinals after the 49ers ruled out Brock Purdy (left shoulder/toe).

EDGE Analysis

Purdy did everything in his power to be available to the 49ers offense after missing just one game due to a turf toe variant and also an AC joint sprain in his left shoulder. Having said that, his absence will extend to two contests, setting Jones up for another spot start under center. Working in place of Purdy last Sunday at New Orleans, Jones led San Francisco to a 26-21 win while completing 26 of 39 passes for 279 yards, three touchdowns and no interceptions, rushing six times for six yards and fumbling twice (one lost).

Jones is on track for another start, with 49ers coach Kyle Shanhan saying Friday that Brock Purdy (toe/shoulder) is "highly unlikely" to start Sunday's game against Arizona, Adam Schefter of ESPN reports.

EDGE Analysis

The Niners list Purdy as questionable, but Shanahan's comments suggest it's only to leave the door open for a backup role. Jones is preparing for another start, after completing 26 of 39 passes for 279 yards and three touchdowns in a 26-21 win over the Saints last week.

Jones completed 26 of 39 passes for 279 yards and three touchdowns in Sunday's 26-21 win over the Saints. He added six rushing yards on six carries.

EDGE Analysis

The three passing TDs tied the former Patriot's career high, as Jones connected with Luke Farrell in the first quarter, Christian McCaffrey in the second and Jauan Jennings in the fourth. With Brock Purdy (toe/shoulder) expected to miss multiple games, Jones could get a chance to grow comfortable at the helm of the 49ers' offense, although he'll be without the services of George Kittle (hamstring) and Brandon Aiyuk (knee). Assuming Purdy doesn't make a rapid recovery, Jones will look to carry his momentum into a Week 3 matchup against the Cardinals.

Jones will start Sunday's game at New Orleans in place of Brock Purdy (toe), Adam Schefter of ESPN reports.

EDGE Analysis

There have long been rumors about Kyle Shanahan preferring Jones to Trey Lance -- but getting overruled by GM John Lynch -- ahead of the 2021 NFL Draft. The ship that Jones is captaining now isn't nearly as pretty as the one he would've been joining back then, as the 49ers currently have TE George Kittle (hamstring) and WR Brandon Aiyuk (knee) on injured reserve, with LT Trent Williams (knee) and WR Jauan Jennings (shoulder) listed as questionable. Jones gets a decent matchup, at least, playing indoors against a Saints team that's less talented than even this injury-riddled version of the 49ers. Reports suggest Jones is likely to start multiple games, although the Niners waited until Friday to rule Purdy out for Week 2.

San Francisco coach Kyle Shanahan suggested Jones is likely to start Sunday's game at New Orleans in place of Brock Purdy (toe, shoulder), Nick Wagoner of ESPN.com reports.

EDGE Analysis

To be exact, Shanahan said Purdy is a "long shot" for Week 2 and could even end up missing multiple games, even though the QB took every snap in a Week 1 win at Seattle. Jones has 49 NFL starts to his name, including seven last year in Jacksonville, but he's never come close to the solid numbers he posted his rookie year in New England. He did help Jaguars WR Brian Thomas put up huge stats last December, so there's at least potential for Jones to keep things rolling for Christian McCaffrey, Ricky Pearsall and Jauan Jennings (shoulder) while Purdy and George Kittle (IR - hamstring) miss time.

Jones (knee) was a full participant in Wednesday's practice, Cam Inman of The San Jose Mercury News reports.

EDGE Analysis

Jones missed the 49ers' preseason finale due to a knee sprain, but his full participation in Wednesday's practice indicates it is no longer an issue. The 2021 first-rounder is slated to begin the season as the 49ers' backup quarterback behind Brock Purdy. Jones had the same role in Jacksonville last year behind Trevor Lawrence, but the former appeared in 10 regular-season games (seven starts) and completed 65.3 percent of his passes for 1,672 yards, eight touchdowns and eight interceptions while rushing for 92 yards and one score on 28 carries.

San Francisco head coach Kyle Shanahan said Tuesday that Jones will miss Saturday's preseason finale against the Chargers due to a knee sprain, Adam Schefter of ESPN reports.

EDGE Analysis

Jones is expected to be ready for Week 1, but for the 49ers' exhibition finale it will have to be Carter Bradley and Nate Sudfeld who either split reps or enter after Brock Purdy, depending on whether Shanahan opts to play his starters Saturday. With nearly three weeks to get healthy before suiting up on the road at Seattle on Sunday, Sept. 7, though, Jones should have plenty of time to recover and open the regular season as the No. 2 option behind Purdy.

Jones is not practicing Tuesday due to an apparent knee injury suffered during Saturday's 22-19 preseason win over the Raiders, Matt Maiocco of NBC Sports Bay Area reports.

EDGE Analysis

Jones' injury isn't believed to be serious, but it could impact his availability for Saturday's preseason finale against the Chargers. San Francisco already has Carter Bradley on the roster and signed Nate Sudfeld on Tuesday, per Adam Schefter of ESPN, giving the team additional depth behind Jones and starter Brock Purdy.

Jones completed four of seven pass attempts for 74 yards and an interception while rushing once for two yards in Saturday's 30-9 preseason loss to the Broncos.

EDGE Analysis

Jones got the nod under center with starter Brock Purdy and the rest of San Francisco's key starters sitting out Saturday's exhibition opener. The veteran backup led a scoring drive that resulted in a Patrick Taylor rushing touchdown to open the contest, but he also committed a turnover on his third and final possession. Jones isn't facing any competition for the 49ers' No. 2 job as he continues to get acclimated with a new offense.