The 49ers signed Isabella to a one-year contract Thursday, Jennifer Lee Chan of NBC Sports Bay Area reports.

Isabella hasn't caught a regular-season pass since the 2022 season with the Cardinals, the team that selected him in the second round of the 2019 Draft. Isabella spent time in the UFL with the St. Louis Battlehawks earlier this year. He should be viewed as a longshot to make the Niners' 53-man roster.

The 49ers signed Callaway to a one-year contract Thursday, Jennifer Lee Chan of NBC Sports Bay Area reports.

The 27-year-old wide receiver appeared in two regular-season games for the Bucs last season but played just five offensive snaps and didn't draw a single target. He hasn't played meaningful regular-season snaps since 2022 with the Saints and should be viewed as a long shot to make the Niners' 53-man roster.

Shavers (ankle) returned to practice Thursday, Sal Capaccio of WGR Sports Radio 550 Buffalo reports.

Shavers injured his ankle last weekend and had to be carted off the field, but he avoided a serious injury and should be ready to roll for the Bills' preseason opener next week. Shavers has an uphill climb to win a roster spot with Buffalo after he spent most of 2024 on the practice squad.

Marshall (knee) remained sidelined for Thursday's practice, Dave Zangaro of NBC Sports Philadelphia reports.

Marshall was injured during Tuesday's session and hasn't practiced since. The 25-year-old signed with the Eagles back in April after spending 2024 with the Panthers, 49ers and Raiders. Marshall appeared in seven regular-season games last season, all with Las Vegas, and caught three passes for 41 yards on six targets. He's trying to win a job in a top-heavy Philadelphia wideout room behind A.J. Brown and DeVonta Smith. Jobs are up for grabs behind the two locked-in starters, but Marshall needs to get healthy.

Johnson (undisclosed) hasn't practiced since last week at Tampa Bay's camp, Greg Auman of Fox Sports reports.

Johnson can't afford to miss much time, as he's competing with Sterling Shepard, Trey Palmer (hamstring), Ryan Miller and Rakim Jarrett, among others, for jobs behind Mike Evans, Chris Godwin (ankle), Emeka Egbuka and Jalen McMillan in Tampa Bay's wide-receiver corps. Johnson appeared in five regular-season games last season, failing to catch his lone target while rushing two times for 11 yards.

Palmer (hamstring) missed practice Thursday, Greg Auman of Fox Sports reports.

Palmer is in a fight for a roster spot and can't afford to miss much action. He's competing with the likes of Sterling Shepard, Tez Johnson, Ryan Miller, Rakim Jarrett and Kameron Johnson (undisclosed) for jobs behind Mike Evans, Chris Godwin (ankle), Emeka Egbuka and Jalen McMillan in Tampa Bay. Palmer's playing time was cut by more than half last season compared to 2023, and he posted a 12-172-1 receiving line on 305 offensive snaps over 15 regular-season contests.

Cardinals head coach Jonathan Gannon said Thursday that Harrison (knee) will not practice due to soreness, adding that the injury isn't serious and his absence is precautionary, Bo Brack of GoPHNX.com reports.

Harrison's injury appears minor, so it should have no impact on his ADP for 2025 fantasy drafts at this stage. The 2024 first-round pick reportedly bulked up to roughly 220 pounds to kick off training camp, a notable development after he entered the league with a listed weight of 209 pounds. Expectations are high for Harrison entering Year 2, despite a disappointing rookie campaign compared to expectations, in which he secured just 62 of his 116 targets en route to 885 yards and eight touchdowns while playing all 17 regular-season games. Arizona's receiving corps is notably unchanged from its 2024 iteration, so Harrison is primed to reprise a role that features little target competition other than TE Trey McBride.

San Francisco coach Kyle Shanahan said Thursday that Jennings (calf) is dealing with an aggravation of the injury he dealt with during spring activities, Clayton Holloway of NFL Network reports.

Shanahan declined to offer an update on when Jennings, who left Sunday's practice early, will return. The calf issue Jennings previously dealt with during the offseason was downplayed as minor, and he had successfully passed his physical to start training camp, but it remains to be seen whether this aggravation has resulted in a more serious injury. Jennings had also expressed a desire for a new contract with San Francisco entering training camp, though by all appearances he had been taking part in practices without any sort of hold-in scenario. Meanwhile, Brandon Aiyuk (ACL) remains on the active/PUP list without a clear timetable to return, while Ricky Pearsall came off the active/PUP list Sunday but is sitting out Thursday's session for maintenance reasons, per Jennifer Lee Chan of NBC Sports Bay Area.

Johnson appears to be the frontrunner for the third spot on the Jets' wide receiver depth chart, Zack Rosenblatt of The Athletic reports.

Johnson has impressed the coaching staff with his athleticism and ability to get open by anticipating defensive backs' moves. The veteran wide receiver signed a one-year contract with the Jets in March without much fanfare, but he's putting himself in position to get playing time alongside Garrett Wilson and Josh Reynolds. Other receivers vying for roster spots include Arian Smith, Allen Lazard, Malachi Corley, Xavier Gipson and Jamaal Pritchett.

Williams is participating in practice Thursday after having departed early during Tuesday's session, Matt Schneidman of The Athletic reports.

Williams spent a few days in the concussion protocol before returning to practice Sunday, and head coach Matt LaFleur said his early departure was "all part of the return to play protocol," per Rob Demovsky of ESPN.com. The Packers seem to simply be taking standard precautions with the rookie third-round pick's activity level, and there are currently no indications that his availability might be in jeopardy for the team's preseason opener against Indianapolis on Aug. 9. Williams has reportedly put together a strong start to training camp, but his path to consistent playing time as a rookie is nonetheless unclear, with Dontayvion Wicks (calf), Mecole Hardman and eventually possibly even Christian Watson (ACL) also competing for reps behind Jayden Reed, Matthew Golden and Romeo Doubs.