Quarterback Peyton Manning led the offense on three first-quarter scoring drives — including two touchdown passes to wide receiver Eric Decker — but the 49ers shut out the Broncos in the second half and won by a score of 29-24.

San Francisco kicker David Akers kicked five field goals in the game to help the 49ers score on their first five possessions of the second half – one touchdown on the opening drive followed by four field goals.

Manning finished his outing with 122 yards on 10-of-12 passing and two touchdowns, giving him a quarterback rating of 148.6. He exited the game near the end of the first quarter.

Decker finished with four catches for 38 yards, including the two first-quarter touchdown grabs. Tight end Joel Dreessen caught the third and final Denver touchdown from quarterback Caleb Hanie.

On the ground, rookie running back Ronnie Hillman led the way for Denver with 10 carries for 29 yards.

Denver’s preseason record is now 1-2. Next, it travels to Arizona for the preseason finale against the Cardinals.

David Akers kicked a 44-yard field goal — his fifth of the game — to give the 49ers a 5-point advantage.

The drive began when the Broncos turned the ball over on downs, as San Francisco cornerback Perrish Cox hit Jeremiah Johnson in the backfield on 4th-and-1.

The 49ers took over on the Denver 42 and picked up one first down before trotting out David Akers for the fifth time.

BRONCOS VS. 49ERS:

FINAL SCORE: SAN FRANCISCO 29, DENVER 24: A second-half comeback fueled the 49ers to a preseason victory over the Broncos.

Below are the live blogs from all of the game’s action. Check back to DenverBroncos.com for post-game coverage of the Broncos’ third preseason game.

BRONCOS ON TWITTER: Fans can also follow the action on Twitter via the Broncos’ official gameday account. @BroncosGameday will keep fans updated with live, in-game updates throughout today’s contest.

BRONCOS VS. 49ERS ROSTER UPDATE: A list of players who are not expected to play in tonight’s game.

CAPTAINS, COIN TOSS AND STARTERS: The offense has taken the field first at Sports Authority Field at Mile High.

BRONCOS STRIKE FIRST: Matt Prater nailed a 53-yard field goal on the game’s opening possession.

MANNING TO DECKER TOUCHDOWN: Peyton Manning throws his first touchdown as a Denver Bronco.

MANNING AND DECKER STRIKE AGAIN: Manning and Decker connected for their second touchdown pass of the quarter.

DEFENSE HOLDS AFTER TURNOVER: The Denver defense forced the 49ers to settle for a field goal after they gained possession inside the 20-yard line.

INJURY UPDATE: Running back Lance Ball is out for the game.

DENVER EXTENDS LEAD BEFORE HALFTIME: A Joel Dreessen touchdown catch extended Denver’s lead to 24-10 at the half.

FIRST HALF PHOTO GALLERY: Click here to view photos from the first half.

FIRST HALF AUDIO HIGHLIGHTS: Listen to audio highlights from the first half of the Broncos’ third preseason game against the San Francisco 49ers, courtesy of AM 850 KOA.

49ERS OPEN SECOND HALF WITH SCORE: The 49ers pulled within one touchdown of the Broncos on the opening drive of the second half.

49ERS GET THREE: San Francisco has scored on both of its second-half possessions to cut Denver’s lead to four points.

GOAL-LINE STAND PRESERVES DENVER LEAD: The Broncos stopped the 49ers three times from inside the 5-yard line to hold on to a slim advantage.

49ERS TAKE THE LEAD: David Akers gives San Francisco its first lead with a 32-yard field goal.

SAN FRANCISCO EXTENDS LEAD WITH FIELD GOAL: David Akers tacked on another field goal to put the 49ers ahead, 29-24.

With less than 10 minutes left in regulation, the 49ers grabbed their first lead of the game, 26-24, on a fourth David Akers field goal.

The 32-yard kick capped off a nine-play, 49-yard drive highlighted by a 27-yard Rock Cartwright run.

On the final third down of the possession, rookie defensive lineman Malik Jackson hit quarterback Scott Tolzien on a scramble up the middle and forced a fumble, but San Francisco recovered and kicked the field goal on the next play.

A 46-yard pass from Colin Kaepernick to Kyle Williams quickly placed the 49ers on the Denver 25-yard line. Then, two passes of 7 and 11 yards to Anthony Dixon helped San Francisco set up from the 3-yard line with a first-and-goal.

Defensive tackle Mitch Unrein made two straight tackles on running plays and rookie linebacker Steven Johnson hit Rock Cartwright in the backfield to force San Francisco to settle for a 21-yard field goal.

The 49ers have scored on all three second-half possessions and now trail 24-23. David Akers is 3-of-3 on the day.

San Francisco cut the Broncos’ lead to 24-20 with a field goal on its second possession of the half. Quarterback Colin Kaepernick led the drive with strong running from Anthony Dixon, who carried it twice and picked up gains of 11 and 8 yards.

On third down, linebackers Steven Johnson and Nate Irving stopped Kaepernick on a scramble to force the 49ers to kick a field goal. David Akers converted on the 45-yard try.

San Francisco scored a touchdown on the opening drive of the second half to pull within seven points.

Fullback Anthony Dixon reached the end zone with a 26-yard run. The drive was aided by a 31-yard defensive pass interference penalty called on Broncos cornerback Omar Bolden.

With the Broncos ahead 24-17, rookie quarterback Brock Osweiler is now in at quarterback.

Quarterback Caleb Hanie and the Broncos offense made the score 24-10 with a touchdown inside the final minute of the half.

The score came on a 5-yard completion from Hanie to tight end Joel Dreessen with :36 remaining. It finished a 12-play, 73-yard drive.

Running back Knowshon Moreno had four touches on the drive, including an 18-yard catch-and-run.

Denver took its 24-10 lead into the half.