12:02 PM - George Kittle (SF) (core muscle) recently told the Bussin' With The Boys podcast that he lost nearly 30 pounds at the beginning of the offseason while rehabbing injuries.

5:57 PM - George Kittle (SF) (groin) has set a goal to be ready for training camp following core muscle surgery this offseason, Matt Maiocco of NBC Sports Bay Area reports.

12:18 PM - George Kittle (SF) John Lynch said Monday that Kittle is recovering from an offseason procedure intended to address a core muscle injury, and that the tight end is on track to be fully cleared by training camp, Matt Maiocco of NBC Sports Bay Area reports.

11:23 AM - George Kittle (SF) and the 49ers have reached agreement on a restructured contract, Field Yates of ESPN reports.

7:45 PM - George Kittle (SF) (toe) practiced fully Friday and doesn't have an injury designation for Super Bowl LVIII versus the Chiefs on Sunday.

7:18 PM - George Kittle (SF) (toe) was limited in Wednesday's practice, David Lombardi of The Athletic reports.

6:53 PM - George Kittle (SF) (toe) didn't practice Friday but doesn't have an injury designation after the first week of prep for Super Bowl LVIII against the Chiefs, Josh Dubow of The Associated Press reports.

2:46 PM - George Kittle (SF) (toe) won't practice Thursday, Matt Barrows of The Athletic reports.

5:15 PM - George Kittle (SF) (toe) was estimated as a non-participant on Wednesday's injury report, Josh Dubow of The Associated Press reports.

7:06 PM - George Kittle (SF) Kyle Shanahan said Monday that Kittle will be day-to-day this week due to a toe injury, Nick Wagoner of ESPN.com reports.

6:20 PM - George Kittle (SF) (back) was a full participant at Tuesday's practice, Nick Wagoner of ESPN.com reports.

4:34 PM - George Kittle (SF) won't play Sunday against the Rams due to back spasms.

5:13 PM - George Kittle (SF) caught one of two targets for one yard in Sunday's 19-17 loss to Cleveland.

5:12 PM - George Kittle (SF) (groin) caught three of six targets for 19 yards in Sunday's 30-7 win over the Steelers.

11:39 AM - George Kittle (SF) (groin) is active for Sunday's game against the Steelers.

5:26 AM - George Kittle (SF) (groin), who is listed as questionable, is expected to suit up for Sunday's road matchup against the Steelers, Adam Schefter of ESPN reports.

3:56 PM - George Kittle (SF) (groin) is listed as questionable for Sunday's game at Pittsburgh, Nick Wagoner of ESPN.com reports.

6:30 PM - George Kittle (SF) (groin) practiced on a limited basis Thursday, Matt Barrows of The Athletic reports.

7:07 PM - George Kittle (SF) was a limited practice participant Wednesday due to a groin injury, Nick Wagoner of ESPN.com reports.

5:50 PM - George Kittle (SF) (undisclosed) participated in the open portion of Wednesday's practice, Cam Inman of The San Jose Mercury News reports.

2:33 PM - George Kittle (SF) (undisclosed) is working off to the side during Monday's practice, Nick Wagoner of ESPN.com reports.

5:41 PM - George Kittle (SF) (undisclosed) is still dealing with an injury from training camp and won't resume practicing until next week, Nick Wagoner of ESPN.com reports.

5:27 PM - George Kittle (SF) (groin) was back at practice Monday, Matt Barrows of The Athletic reports.

7:08 PM - George Kittle (SF) Francisco coach Kyle Shanahan said Sunday that he expects Kittle (groin) will return to practice at some point during this coming week, Lindsey Pallares of the team's official site reports.

2:05 PM - George Kittle (SF) (adductor strain) didn't practice Thursday, Eric Branch of the San Francisco Chronicle reports.

8:47 PM - George Kittle (SF) caught three of four targets for 32 yards in Sunday's 31-7 NFC Championship Game loss to Philadelphia.

9:26 PM - George Kittle (SF) had three receptions (five targets) for 39 yards and a touchdown in Sunday's 31-14 win over the Rams.

9:23 PM - George Kittle (SF) caught six of nine targets for 98 yards and a touchdown in Sunday's 44-23 loss to the Chiefs.

10:04 PM - George Kittle (SF) had eight catches on 10 targets for 83 yards in Sunday's 28-14 loss to the Falcons.

9:16 PM - George Kittle (SF) caught five of six targets for 47 yards in Sunday's 37-15 win over the Panthers.

11:24 PM - George Kittle (SF) caught two of four targets for 24 yards in Monday's 24-9 win over the Rams.

4:44 PM - George Kittle (SF) (groin) has been cleared for Sunday's game against Denver, avoiding a designation on the final injury report, Nick Wagoner of ESPN.com reports.

6:32 PM - George Kittle (SF) (groin) was limited at practice Thursday, Matt Maiocco of NBC Sports Bay Area reports.

4:11 PM - George Kittle (SF) Kyle Shanahan said Kittle (groin) will be a limited practice participant Wednesday, Nick Wagoner of ESPN.com reports.

6:49 PM - George Kittle (SF) Kyle Shanahan said Kittle (groin) was close to being available for the 49ers' Week 2 matchup with the Seahawks, Matt Maiocco of NBC Sports Bay Area reports.

2:40 PM - George Kittle (SF) (groin) is listed as inactive Sunday versus the Seahawks, Lindsey Pallares and Briana McDonald of the 49ers' official site report.

6:04 AM - George Kittle (SF) (groin) is not expected to suit up for Sunday's game against the Seahawks, Adam Schefter of ESPN reports.

4:42 PM - George Kittle (SF) (groin) is listed as questionable for Sunday's game against Seattle, with coach Kyle Shanahan saying the tight end looked "awesome" in his return to a limited practice Friday, David Lombardi of The Athletic reports.

3:25 PM - George Kittle (SF) (groin) is present for Friday's practice, Matt Barrows of The Athletic reports.

4:15 PM - George Kittle (SF) (groin) isn't participating in practice Thursday, Cam Inman of The San Jose Mercury News reports.

4:15 PM - George Kittle (SF) (groin) isn't participating in practice Thursday, Cam Inman of The San Jose Mercury News reports.

3:59 PM - George Kittle (SF) Kyle Shanahan said Kittle (groin) won't take part in practice Wednesday, Cam Inman of The San Jose Mercury News reports.

3:59 PM - George Kittle (SF) Kyle Shanahan said Kittle (groin) won't take part in practice Wednesday, Cam Inman of The San Jose Mercury News reports.

7:14 PM - George Kittle (SF) Kyle Shanahan indicated that Kittle (groin) could practice Wednesday, Matt Maiocco of NBC Sports Bay Area reports.

7:14 PM - George Kittle (SF) Kyle Shanahan indicated that Kittle (groin) could practice Wednesday, Matt Maiocco of NBC Sports Bay Area reports.

11:41 AM - George Kittle (SF) (groin) is listed as inactive Sunday at Chicago, Matt Maiocco of NBC Sports Bay Area reports.

11:41 AM - George Kittle (SF) (groin) is listed as inactive Sunday at Chicago, Matt Maiocco of NBC Sports Bay Area reports.

10:16 PM - George Kittle (SF) (groin) isn't slated to play in Sunday's game at Chicago, Eric Branch of the San Francisco Chronicle reports.

10:16 PM - George Kittle (SF) (groin) isn't slated to play in Sunday's game at Chicago, Eric Branch of the San Francisco Chronicle reports.

4:48 PM - George Kittle (SF) (groin) is listed as questionable for Sunday's game against Chicago, Matt Barrows of The Athletic reports.

4:48 PM - George Kittle (SF) (groin) is listed as questionable for Sunday's game against Chicago, Matt Barrows of The Athletic reports.

3:48 PM - George Kittle (SF) (groin) isn't present for the media-access portion of Friday's practice, suggesting he's unlikely to play Sunday in Chicago, Jerry McDonald of The San Jose Mercury News reports.

3:48 PM - George Kittle (SF) (groin) isn't present for the media-access portion of Friday's practice, suggesting he's unlikely to play Sunday in Chicago, Jerry McDonald of The San Jose Mercury News reports.

4:15 PM - George Kittle (SF) (groin) didn't take part in Thursday's practice, David Lombardi of The Athletic reports.

4:15 PM - George Kittle (SF) (groin) didn't take part in Thursday's practice, David Lombardi of The Athletic reports.

3:18 PM - George Kittle (SF) who sat out the 49ers' first official practice of the week Wednesday, is dealing with a groin injury that's considered serious enough to potentially sideline him for Sunday's season opener in Chicago, Aaron Wilson of ProFootballNetwork.com reports.

3:18 PM - George Kittle (SF) who sat out the 49ers' first official practice of the week Wednesday, is dealing with a groin injury that's considered serious enough to potentially sideline him for Sunday's season opener in Chicago, Aaron Wilson of ProFootballNetwork.com reports.

4:03 PM - George Kittle (SF) Kyle Shanahan said Kittle won't practice Wednesday due to a groin injury, Cam Inman of The San Jose Mercury News reports.

4:03 PM - George Kittle (SF) Kyle Shanahan said Kittle won't practice Wednesday due to a groin injury, Cam Inman of The San Jose Mercury News reports.

11:47 PM - George Kittle (SF) started but didn't catch his only target in Thursday's 17-0 preseason loss to the Texans.

7:23 PM - George Kittle (SF) is in uniform and appears set to play in Thursday's preseason game in Houston, Eric Branch of the San Francisco Chronicle reports.

6:05 PM - George Kittle (SF) and most other starters will be held out of Saturday's preseason game against Minnesota, Cam Inman of The San Jose Mercury News reports.

8:16 PM - George Kittle (SF) isn't expected to play in Friday's preseason game against the Packers, Nick Wagoner of ESPN.com reports.

6:07 PM - George Kittle (SF) who dealt with a lower-body issue during OTAs, is participating in training camp practices, David Lombardi of The Athletic reports.

6:07 PM - George Kittle (SF) who dealt with a lower-body issue during OTAs, is participating in training camp practices, David Lombardi of The Athletic reports.

5:38 PM - George Kittle (SF) head coach Kyle Shanahan said Tuesday that Kittle is dealing with a "lower half" issue and isn't expected to participate during OTAs this week, Cam Inman of The San Jose Mercury News reports.

9:35 AM - George Kittle (SF) has agreed to restructure his contract, Field Yates of ESPN reports.

10:54 PM - George Kittle (SF) had two receptions (five targets) for 27 yards and a touchdown in Sunday's 20-17 loss to the Rams.

2:58 PM - George Kittle (SF) isn't listed on the 49ers injury report ahead of their NFC Championship Game matchup with the Rams on Sunday, Matt Maiocco of NBC Sports Bay Area reports.

10:27 PM - George Kittle (SF) caught one of three targets for 18 yards in Sunday's 23-17 win over the Cowboys in the wild-card round.

11:21 PM - George Kittle (SF) had five receptions (seven targets) for just 10 yards in Sunday's 27-24 overtime win over the Rams.

9:43 PM - George Kittle (SF) caught one of two targets for 29 yards and had one carry for six yards in Sunday's 23-7 win over Houston.

11:46 PM - George Kittle (SF) brought in two of three targets for 21 yards in the 49ers' 20-17 loss to the Titans on Thursday night.

7:52 PM - George Kittle (SF) hauled in all six of his targets for 93 yards in Sunday's 31-13 win over Atlanta.

6:37 PM - George Kittle (SF) (knee) was a full practice participant Friday and doesn't have an injury designation for Sunday's game against Atlanta.

7:59 PM - George Kittle (SF) (knee) practiced in a limited fashion Thursday, Matt Maiocco of NBC Sports Bay Area reports.

2:40 PM - George Kittle (SF) will be held out of Wednesday's practice with knee soreness, Nick Wagoner of ESPN.com reports.

11:02 PM - George Kittle (SF) caught 13 of 15 targets for 151 yards and a touchdown in Sunday's 26-23 overtime win over the Bengals.

11:51 PM - George Kittle (SF) caught nine of 12 targets for 181 yards and two touchdowns in Sunday's 30-23 loss to the Seahawks.

11:19 PM - George Kittle (SF) caught one of two targets for 13 yards in Sunday's 34-28 win over the Vikings.

4:39 PM - George Kittle (SF) caught four passes for 34 yards and one touchdown on four targets against Jacksonville on Sunday.

11:16 PM - George Kittle (SF) caught five of seven targets for 50 yards and a touchdown in Monday night's 31-10 win over the Rams.

5:45 PM - George Kittle (SF) (calf) does not carry an injury designation into Monday's contest against the Rams, Nick Wagoner of ESPN.com reports.

6:43 PM - George Kittle (SF) (calf) remained limited Friday at practice, Cam Inman of The San Jose Mercury News reports.

5:17 PM - George Kittle (SF) (calf) will be a limited participant in Thursday's practice, Jennifer Lee Chan of NBC Sports Bay Area reports.

2:02 AM - George Kittle (SF) will be on a pitch count Sunday against the Cardinals in his first game back from a calf injury and is expected to play about half the game, Adam Schefter of ESPN reports.

4:34 PM - George Kittle (SF) (calf) was activated off injured reserve Saturday and will play Sunday against the Cardinals, Doug Kyed of Pro Football Focus reports.

4:35 PM - George Kittle (SF) Francisco head coach Kyle Shanahan confirmed Kittle (calf) will return from injured reserve ahead of Sunday's game against the Cardinals, Jennifer Lee Chan of NBC Sports Bay Area reports.

7:31 PM - George Kittle (SF) 49ers designated Kittle (calf) for return from injured reserve Wednesday, Keiana Martin of the team's official site reports.

7:29 PM - George Kittle (SF) 49ers are expected to open the practice window for Kittle (calf) this week, Nick Wagoner of ESPN.com reports.

3:56 PM - George Kittle (SF) Kyle Shanahan expects Kittle (calf) to return for the 49ers' Week 9 game against the Cardinals, Matt Maiocco of NBC Sports Bay Area reports.

4:08 PM - George Kittle (SF) (calf) has been officially placed on IR by the 49ers.

3:45 PM - George Kittle (SF) 49ers plan to place Kittle (calf) on IR, Tom Pelissero of NFL Network reports.

6:22 PM - George Kittle (SF) (calf) was a non-participant in Friday's practice prior to being listed as doubtful for Sunday's game against Arizona.

4:28 PM - George Kittle (SF) (calf) is listed as doubtful for Sunday's game against the Cardinals, Nick Wagoner of ESPN.com reports.

3:30 PM - George Kittle (SF) (calf) isn't participating in Thursday's practice, Chris Biderman of The Sacramento Bee reports.

3:41 PM - George Kittle (SF) (calf) isn't practicing Wednesday, Matt Maiocco of NBC Sports Bay Area reports.

6:58 PM - George Kittle (SF) Kyle Shanahan considers Kittle to be day-to-day with a calf injury, Jennifer Lee Chan of NBC Sports Bay Area reports.

2:37 PM - George Kittle (SF) (calf) is active for Sunday's game against the Seahawks, Keiana Martin of the 49ers' official site reports.

7:54 AM - George Kittle (SF) (calf) is expected to play Sunday against Seattle, Adam Schefter of ESPN reports.