49ers key matchup No. 1: Colin Kaepernick vs. Jason Campbell

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49ers key matchup No. 1: Colin Kaepernick vs. Jason Campbell

This is the final part in a series that spotlights three 49ers-Bears matchups to watch Monday, 5:30 p.m. (ESPNCBS 5), at Candlestick Park.49ers QB Colin Kaepernick vs. Bears QB Jason CampbellTale of the tape
Kaepernick (7): 6-foot-4, 230 pounds, second season, Nevada
Campbell (2): 6-foot-5, 230 pounds, eighth season, AuburnJason Campbell has 70 career starts on his resume in six previous seasons with the Washington Redskins and Raiders.Colin Kaepernick is slated to make his first NFL start.MAIOCCO: Key matchup No. 2 -- Crabtree vs. TillmanWhen the 49ers face the Chicago Bears on Monday night, it will likely be a game that comes down to the quarterbacks. It might be the quarterback who makes the most plays. Or, more likely, the difference could come down to the quarterback who simply avoids the major mistake.In what figures to be a low-scoring game, it might not take much to turn the game. The 49ers own the league's third-ranked defense, while the Bears' defense is No. 5.The 49ers' defense leads the NFL with just 14.1 points allowed per game. The Bears are generating turnovers at a rate of 30 takeaways in nine games."Obviously, they're a great defense," Kaepernick said last week when it appeared as if Alex Smith was on track to make the start after being asymptomatic and taking part in four days of practices."I think they're No. 1 in the NFL right now," Kaepernick added. "A lot of turnovers, a lot of great players on that side of the ball who have a lot of Pro Bowls, as far as (Brian) Urlacher, (Lance) Briggs, (Julius) Peppers. They have a lot of great players over there. We're going to have our work cut out for us."Campbell takes over for Jay Cutler, who was ruled out of action on Friday due to a concussion he sustained Nov. 11. Kaepernick is scheduled to start in place of Smith, who sustained a concussion in the second quarter of last week's game against the St. Louis Rams.MAIOCCO:Key matchup No. 3 -- Justin Smith vs. Chilo RachalThe 49ers announced Monday morning that Smith has been declared out for Monday's game after being evaluated by team medical director Dr. Dan Garza. Smith had been cleared to participate in practices Wednesday through Saturday.Second-year player Scott Tolzien, who has suited up for just one game in his career, will serve as the 49ers' backup quarterback.Campbell enters Monday's game with a lot of NFL experience. In 19 starts with the Raiders the past two seasons, Campbell posted an 11-7 record as a starter. He sustained a broken collarbone last October, leading the Raiders to trade for Carson Palmer. Campbell did not play again last season, and he signed with the Bears in the offseason."We felt like we needed to improve our backup quarterback position in the offseason," Bears coach Lovie Smith said. "So we felt real good about being able to convince Jason to come here and be Jay's backup."This season, Campbell has completed 12 of 20 passes for 94 yards with no touchdowns and no interceptions. He entered last week's game against the Houston Texans at halftime. Campbell led seven possessions, during which time the Bears managed only four first downs, one field goal and one missed field goal.Kaepernick has seen action in six games this season, including consecutive games against the New York Jets, Buffalo and New York Giants as a change-of-pace quarterback. He has completed 16 of 26 attempts for 206 yards. He is the 49ers' third-leading rusher with 177 yards on 21 attempts.Lovie Smith said last week that his Bears defense would prepare for both Alex Smith and Kaepernick."Colin has been playing some anyway, so we've been preparing for that anyways," Lovie Smith said. "Again, we don't change what we do an awful lot based on change in the quarterback. Both of those quarterbacks have played some for them."

49ers 2017 UDFA tracker: Southern Miss QB reportedly agrees to terms

49ers 2017 UDFA tracker: Southern Miss QB reportedly agrees to terms

SANTA CLARA – The 49ers are reportedly adding a fourth quarterback to their 90-man roster.

Nick Mullens a four-year starter at Southern Mississippi, agreed to terms with the 49ers after the conclusion of the Saturday’s NFL draft, he told the Hattiesburg American.

As a senior, Mullens completed 65.5 percent of his passes for 3,272 yards with 24 touchdowns and 11 interceptions.

Mullens joins a quarterback group that includes starter Brian Hoyer, backup Matt Barkley and third-round draft pick C.J. Beathard.

Other reported 49ers free-agent agreements include:

--RB Matt Breida, Georgia Southern: In three seasons at Georgia Southern, Breida rushed for 3,740 yards and 37 touchdowns while averaging 6.9 yards a carry. (Tampa Bay Times)

--OL Erik Magnuson, Michigan: Magnuson (6-6, 305) was a first-team All-Big Ten performer who started every game at right tackle. He announced on Twitter that he has agreed to terms with the 49ers.

--WR Kendrick Bourne, Eastern Washington: He caught 211 passes for 3,130 yards and 27 touchdowns in his four-year career. Bourne (6-1, 203) had his best season as a senior, with 79 receptions for 1,201 yards and seven touchdowns. Eastern Washington announced Bourne’s three-year contract.

--OT Darrell Williams Jr., Western Kentucky: Williams (6-5, 315) started 41 games. He played his final two seasons at right tackle after moving from right guard. Western Kentucky announced the contract agreement with the 49ers.

--WR KD Cannon, Baylor: Cannon caught 195 passes for 3,113 and 27 touchdowns in his three-year career. He turned pro after a junior season in which he caught 87 passes for 1,215 yards and 13 touchdowns. He announced his contract agreement with the 49ers via Twitter.

--DB Lorenzo Jerome, Saint Francis (PA): Jerome, a Senior Bowl invite, was named first-team FCS All-American. He intercepted six passes in 2016 with 59 tackles, 5.5 tackles for loss and 11 pass break-ups. He added a touchdown on a kickoff return. (Pittsburgh Post Gazette)

--LB Jimmie Gilbert, Colorado (Denver Post)

--OL J.P. Flynn, Montana (NEPatriotsdraft.com)

--DE Noble Nwachukwu, West Virginia (NEPatriotsdraft.com)

--TE Cole Hikutini, Louisville (NFL Network)

--LB Donavin Newsom, Missouri (Columbia Daily Tribune)

--WR Victor Bolden, Oregon State (Bolden via Twitter)

Lynch: TE McDonald to return to 49ers after being on trade block

Lynch: TE McDonald to return to 49ers after being on trade block

SANTA CLARA – The 49ers explored trade options for veteran tight end Vance McDonald during the three-day draft, but he is scheduled be back with the team when the club reports Monday for the fourth week of the offseason program.

“I think that’s the reality of new regimes coming, new schemes,” 49ers general manager John Lynch said Saturday at the conclusion the seven-round draft. “That’s not to say that he can’t fit into our scheme. Frankly, we received some interest from some other people, then we did explore some options throughout the league with Vance. Nothing ended up happening, so Vance will come back and have an opportunity to compete.”

Coach Kyle Shanahan said he called McDonald on Friday night to keep him updated on the team’s though process in pursuing trade options. McDonald was at his brother’s wedding, Shanahan said, so he left him a long voice message. McDonald responded Saturday morning with a text. Shanahan said the two men will speak on Monday in Santa Clara.

“We did take over a 2-14 team,” Shanahan said. “We don’t feel all the answers are here right now. We have a lot of work to do. We need to improve in any way possible. And we’re going to do that. We’re going to do that from an organizational standpoint. How can we improve the building? How can we improve the coaching staff? How can we improve the personnel department? How can we improve the players?

“Just from Vance’s text back, I think people understand that. I think it does make sense. I don’t think that’s something personal.”

Former 49ers general manager Trent Baalke signed off on a five-year contract extension for McDonald in December that consisted of a $7 million signing bonus. McDonald appeared in 11 games last season, catching 24 passes for 391 yards and four touchdowns. The 49ers acquired McDonald as a second-round draft pick 2013. In 48 career games, McDonald has 64 receptions for 866 yards and seven touchdowns.

The 49ers signed veteran tight end Logan Paulsen in the offseason. On Saturday, the 49ers selected Iowa tight end George Kittle in the fifth round of the draft. Kittle joins fellow tight ends McDonald, Garrett Celek, Paulsen, Blake Bell and Je’Ron Hamm on the 49ers’ 90-man roster.