(AP) -- DETROIT (1-0) At SAN FRANCISCO (1-0)Sunday, 8:20 p.m., NBCOPENING LINE - 49ers by 6 12RECORD VS. SPREAD - Detroit 0-1; San Francisco 1-0SERIES RECORD - 49ers lead 36-27-1AP PRO32 RANKING - Lions, No. 13; 49ers, No. 2LAST MEETING - 49ers beat Lions, 25-19, Oct. 16, 2011LAST WEEK - Lions beat Rams 27-23; 49ers beat Packers 30-22STREAKS, STATS AND NOTES - San Francisco 12-1 in series at Candlestick Park. ... Niners handed Lions first loss in 2011 following 5-0 start. ... 49ers have six straight regular-season games without turnover. ... Last year's penalty-filled game featured four lead changes in second half. San Francisco fell behind 10-0 in first quarter. ... 49ers QB Alex Smith has gone 185 straight passes without INT, best in franchise history, passing Hall of Famer Steve Young's 184. Smith had 125.6 QB rating last week. Niners 11-0 in games when he has rating over 100.0. ... San Francisco kept Calvin Johnson out of end zone in 2011 game after he became NFL's first player with nine TD catches in initial five games of a season. Johnson still had seven catches for 113 yards, Brandon Pettigrew with eight catches for 42 yards and TD. ... Last year's game at Ford Field ended with Jim Harbaugh's hard backslap and handshake that irked Jim Schwartz and they had to be separated. Both say no bad blood now. ... Lions still had two top starting DBs, Louis Delmas (knee) and Chris Houston (ankle), on injury report after each missed opener. ... San Francisco K David Akers booted 63-yard field goal last week to tie NFL record and is 3 for 3 on the season. Hit 55-yarder last year vs. Lions on way to single-season NFL mark of 44. ... Three-time Pro Bowl RB Frank Gore had first 100-yard game of year at Green Bay after getting a franchise-best five straight during one stretch in 2011. ... Detroit's Matthew Stafford, No. 1 pick from the 2009 draft, threw three interceptions before halftime for first time last week. Still wound up with 355 yards passing. ... Niners Michael Crabtree matched career high with nine receptions for 77 yards in 11 meeting. ... Lions 2012 starting offensive line leads NFL in games started for their current team with 494 regular-season and five in playoffs for 499. ... Detroit RB Mikel Leshoure must sit out second game of two-game suspension to start year for violating NFL's
Selection: Third round, No. 104 overall
SANTA CLARA -- The 49ers traded back into the end of the third round to select a quarterback to join Brian Hoyer and Matt Barkley on the 49ers' roster.
General manager John Lynch's fourth trade of the draft netted the team the grandson of legendary NFL personnel man Bobby Beathard. His grandson, C.J., joins the 49ers after a four-year career at Iowa. Beathard completed 58.6 percent of his passes last season with 17 touchdowns and 10 interceptions.
Beathard was not generally expected to be chosen within the first two days of the draft. He was the sixth quarterback selected, falling behind Mitch Trubisky, Patrick Mahomes, Deshaun Watson, Deshone Kizer and Davis Webb.
"They won't regret it," Beathard said on a conference call with the Bay Area media.
The 49ers traded up with the Minnesota Vikings. The Vikings had the No. 104 pick, and called the 49ers to see if they were interested in a trade. After some consideration, the 49ers decided to move up from No. 109 while also giving the Vikings a seventh-round pick at No. 219.
"Might he have been there at 109? That’s what we had to weigh," 49ers John Lynch said. "But at the end of the day, we felt like it was worth it to be able to go to bed knowing that we had a player that we liked and want the opportunity develop at the quarterback position."
And that's what coach Kyle Shanahan plans on doing. He said Beathard is not coming to the team this season to compete with Hoyer for the starting job.
"We’re bringing him in here to develop him and give him a chance, but just like any other position, everyone competes," Shanahan said. "Brian is our starting quarterback and, right now, Matt Barkley is our second. And I look at him to come in and be our third with us only having three on the roster.
"By no means did we come into this draft thinking we’re going to get a guy to compete with Brian."
Shanahan said Beathard and Pitt quarterback Nathan Peterman were the two quarterbacks in the draft who ran offenses in college most similar to the offense he will install with the 49ers.
"One thing that helps is being able to see guys play the way you’re going to ask them to play," Shanahan said. "It helps being at Iowa and watching the system he’s in. It’s easier to see to watch him over the years. He’s a three-year starter. He’s led his team to a bunch of wins, especially in 2015 when they had a better team and he played unbelievable."
As a junior at Iowa, Beathard completed 61.6 percent of his pass attempts for 2,809 yards with 17 touchdowns and five interceptions.
"He’s a leader. He’s tough. He processes very well," Shanahan said. "He's extremely accurate and he lives and dies football."
Height: 6-2 3/4
Selection: Third round, No. 66 overall
SANTA CLARA – The 49ers selected Colorado cornerback Ahkello Witherspoon, a Sacramento native, in the third round of the NFL draft with the No. 66 overall pick.
“Being close to home is an incredible opportunity, as well as the type of defense they play -- press man, up in your face,” Witherspoon said. “When I came in for a visit, they were asking me if I’ve adopted that role and if I’d be willing to continue that. And I said, ‘Absolutely.’
“It’s an opportunity to play for such a great organization, close to home, with such a savvy defensive mentality. I think it’s going to be a great place for me.”
The 49ers were also scheduled to have the next pick, but traded the selection at No. 67 for the New Orleans Saints’ second-round pick in next year’s draft, as well as a seventh-round selection (No. 229 overall) this year. The 49ers now have 10 picks in next year’s draft.
The Saints used that pick at No. 67 to select Tennessee running back Alvin Kamara.
Witherspoon began his college career at Sacramento City. He played his final three college seasons at Colorado. He started 12 games last season and earned second-team All-Pac-12 honors.
Witherspoon led the nation with 22 pass breakups. He recorded one interception -- a game-saving pick in the end zone to preserve a 41-38 victory over Oregon. A pre-med student majoring in ecology and evolutionary biology, he said he aspires to be a doctor after his football career.
But Witherspoon said he is committed to football and promised the 49ers during his visit to Santa Clara that he will make huge strides over the next few years as he continues to develop as a player.