CHICAGO -- Daniel Kilgore could make his 2015 season debut on Sunday.

The fifth-year offensive lineman was activated off the team's Physically Unable to Perform list on Saturday. A day later, Kilgore was not among the team's inactive players for a Week 13 matchup against the Chicago Bears.

Here are San Francisco's inactives:

WR Jerome Simpson
WR DeAndrew White
RB Pierre Garçon
CB Chris Davis
G Brandon Thomas
OL Ian Silberman
TE Garrett Celek

Shauhn Draughn will make his fourth consecutive start in place of Hyde.

For Chicago, the Bears announced the following inactives:

WR Marquess Wilson
WR Eddie Royal
S Antrel Rolle
CB Jacoby Glenn
RB Antone Smith
G/T Nick Becton
DL Bruce Gaston

Safety Chris Prosinski will start in place of Rolle; wide receiver Joshua Bellamy will start in place of Royal.

Keep it locked here throughout the day for more live updates from Soldier Field.

First Quarter

-NaVorro Bowman called tails, but it was heads. The Bears won the coin toss and elected to kick. San Francsico received the ball first.

-The 49ers went 3-and-out on their opening drive. The team has yet to produce a touchdown drive on an opening possession this season. Following Blaine Gabbert's third-down pass to Shaun Draugn, which went for a 3-yard loss, Chicago had a punt return for a touchdown from cornerback Bryce Callahan negated by an obvious holding penalty. The Bears began their frist drive from their own 41-yard line.

-Tramaine Brock broke up a would-be 30-yard touchdown from Jay Cutler to Joshua Bellamy. The 49ers cornerback timed his jump perfectly and knocked away the deep throw. San Francisco gave up one first down on the drive, but held strong thanks to a well-timed third-down blitz from Bowman to ultimately force a 40-yard field goal from Robbie Gould. Chicago leads 3-0 with 10:17 left in the first quarter.-The 49ers responded with another 3-and-out. Gabbert was sacked by defensive lineman Janoris Jenkins on third down. So far, Gabbert has -3 passing yards; Draughn has -3 rushing yards. -The Bears have great field position again at their own 47. Michael Wilhoite was shaken up on a first-down run from Jeremy Langford. Gerald Hodges entered the game in his place. Wilhoite walked to the locker room with team doctors. Meanwhile, Bowman, already has four tackles in the game. "Tackle by Bowman" could be a repeated phrase by the press box announcer in Chicago. The 49ers stopped the Bears on third down just inside San Francisco territory. Gould made a 51-yard field goal. Chicago leads 6-0 with 5:59 left in the first quarter.-Wilhoite has a left ankle injury and was announced as questionable to return. A holding penalty negated a first-down run by Draughn on 3rd-and-6. Facing a 3rd-and-16 from their own 11, Gabbert's pass to Garrett Celek was tackled 10 yards shy of the first-down marker. Bradley Pinion took the field for his third punt of the first quarter. The punt traveled a career-high distance of 62 yards. The Bears will take over from their 33.

-Jimmie Ward scored the first touchdown of the day when he correctly read a Cutler quick-screen to Alshon Jeffery. Ward, a Northern Illinois product, stepped in front of the throw and returned it 29 yards for the score. It was San Francisco's first touchdown of the first quarter all season. It was also Ward's first career interception and touchdown. Phil Dawson's point after attempt, however, was blocked by Chicago. San Francisco tied the game 6-6 with 2:49 left in the first quarter.

-Jarryd Hayne loved it.

Second Quarter

-Chicago didn't hold back in responding to the turnover. Cutler hit Jeffery for a gain of 31 on an 8-play, 80-yard scoring drive which was capped by a 5-yard Matt Forte touchdown run. Nose tackle Ian Williams was shaken up on the scoring play, too. Chicago regained the lead, 13-6, with 13:37 left in the second quarter.-Just after Gabbert scrambled for a first down. It was announced that Williams is probable to return with a knee injury. San Francisco converted a third-down with a 4-yard plunge from fullback Bruce Miller. The team was 0-for-9 last week against the Arizona Cardinals. Gabbert converted a 3rd-and-9 with a 12-yard pass to McDonald. The starting tight end was shaken up on the play. Blake Bell entered the game in McDonald's place. The rookie was the only tight end left on the active roster. The 49ers got into the end zone on a 1-yard Draughn touchdown run, which was the team's first rushing score since Week 5. **San Francisco tied the game at 13 with 6:53 left in the second quarter.

**-McDonald was ruled questionable to return with a head injury. Meanwhile, Williams has returned to the game. Bowman was just shaken up on a screen-pass to Forte. The 49ers linebacker headed into the locker room with team doctors.

-A lot just happened. Where to begin... Quinton Patton did an excellent job of keeping a Pinion punt in play. Tracy Porter touched the loose ball, which then was almost recovered by several 49ers. The ball eventually went through the back of the end zone and was ruled a touchback. Because the 49ers touched the ball first, it appeared as though Chicago could advance the ball but never had full control of the ball, thus the 49ers did not get a safety on the play.

-Bowman is being evaluated for a concussion. His return is questionable. Chicago drove to midfield but were forced to punt after Brock broke up a Cutler pass to Jeffery. The play was initially ruled as a catch, but a booth review determined that the Bears wideout failed to maintain control as he fell to the ground. Chicago's punt was downed at San Francisco's 6-yard line.

-Kilgore has entered the game as an extra blocking tight end. The 49ers ran the ball four times to let the clock run out on the first half.

Tie score 13-13 at the half.

Halftime stat leaders:

-Gabbert 11-of-18 for 90 yards
-Draughn 11 rushes, 28 yards
-Draughn four catches, 28 yards
-Bowman six tackles

Bonus stat: San Francisco is 5-on-9 on third down.

Third Quarter

-Bowman returned to the game for Chicago's second play of the half. It appeared as though trainers were looking for Bowman's mouthpiece before letting him get back into the game. Ahmad Brooks is also not in the game. Aaron Lynch and Corey Lemonier are the outside linebackers. On a 3rd-and-4 from San Francisco's 24-yard line, Lynch was injured on the play. Just after he went down, the press box announcer declared Wilhoite (ankle) and McDonald (concussion) both out for the remainder of the game. 

-Gould just missed a 40-yard field goal. The Bears debated on going for a 4th-and-2, but the decision to kick yielded no points. The game is still tied at 13 with 8:43 left in the third quarter.

-The 49ers were forced to punt. Brooks has returned in place of Lynch, who was taken to the locker room and was announced as questionable to return with a head injury. The Bears punted back to the 49ers at their own 15-yard line with :53 left in the third quarter.

Fourth Quarter

-The 49ers faced a 3rd and 9 from their own 16 when the fourth quarter began, but they committed a false-start penalty and later gave up a sack. Gabbert, who was brought down for the third time on the day, limped off the field after being rolled up and bent backwards by multiple Chicago defenders. Following a Pinion punt, the Bears took over at San Francisco's 46-yard line.

-Both teams swapped punts. Not a whole lot to write at the moment. I take that back. Jaquiski Tartt just delivered the ultimate body-slam sack on Cutler to force a Bears punt. Time to find a GIF of the play. Be right back.

-Found it.

-Following Pinion's seventh punt of the game, Chicago was 1st and goal from the 4 after back-to-back Cutler completions, including a 30-yard hookup with Jeffery on a 3rd-and-2 with less than five minutes to play. The Bears regained the lead on a 4-yard touchdown run by Ka'Deem Carey. The Bears now lead 20-13 with 3:32 left in regulation.-Facing a 3rd-and-6 from their own 40, Gabbert called his own number and rushed for a gain of nine yards to move the chains. Gabbert picked up more yards with a game-tying 44-yard touchdown run right through the heart of Chicago's defense. San Francisco has tied the game for the third time today. It is now 20-20 with 1:42 left in the game.

-Crazy. Just when it seemed like things were getting good for the 49ers, the Bears ripped off a 74-yard kick return and are now in position to hit a game-winng kick. Stay tuned.

-GOULD MISSED 36-YARD KICK WIDE LEFT, WE'RE GOING TO OVERTIME.

Overtime

-OK, this should be fun. Apologies for the all caps.-Bruce Ellington returned the opening kick of overtime for 40 yards. San Francisco, however, went 3-and-out.

-Next team to score wins the game. The Bears almost turned the ball over deep in their own territory. Chicago is forced to punt.-GABBERT TO TORREY SMITH FOR 71-YARD TOUCHDOWN.The game is over, 26-20, 49ers win.49ers.com/live for postgame press conferences