The 49ers feel certain they have landed their head coach, according to sources.

And the Atlanta Falcons are reportedly convinced offensive Kyle Shanahan will be entering the head-coaching ranks with the 49ers next season, too.

Atlanta coach Dan Quinn made an announcement to coaches that Shanahan would be the 49ers’ next coach, Mike Silver of the NFL Network reported Wednesday, adding everyone in the room was “super supportive.”

On Wednesday, Quinn was asked at a press conference about Shanahan and the 49ers.

“I know it’s for sure out there, (but it’s) definitely not our story to tell,” Quinn said. “They (the 49ers) will for sure reach out to (general manager) Thomas (Dimitroff) and to the organization and there will be a window for them if they’d like to visit with him for next week. But that’s really where it’s at, and there’s nothing left to do until then."

The Falcons will face the Green Bay Packers on Sunday in the NFC Championship game. The 49ers will have a second interview with Shanahan after the game. Shanahan will also become involved in the process to hire the 49ers’ next general manager.

The 49ers are checking with the NFL to determine what is allowable under the league’s anti-tampering policy, according to a league source. If the Falcons win on Sunday, the 49ers would not be able to officially hire Shanahan until after the Super Bowl on Feb. 5.

According to sources, the 49ers have narrowed their initial search for the next general manager to four candidates: Eliot Wolf and Brian Gutekunst of Green Bay, Minnesota’s George Paton and Terry McDonough of Arizona.

The general manager candidates are expected to meet with Shanahan, but it’s unclear whether Shanahan can interview the candidates if the Falcons advance to the Super Bowl and he is not officially the 49ers’ coach. The 49ers are expected to hold a second round of general manager interviews early next week and could fill the position by the end of next week.

49ers sign six draft picks, 18 undrafted rookies

49ers rookie quarterback Beathard benefits from running pro-style offense

Source: 49ers release 2015 fourth-round draft pick

Three former 49ers, including Mike Purcell, claimed off waivers

Report: Reuben Foster's shoulder caused draft fall

The 49ers on Thursday announced contract signings with their six picks selected on the final day of the draft.

The 49ers reached the mandatory four-year contract agreements with the following players:

Fourth round, No. 121: RB Joe Williams, Utah
Fifth round, No. 146: TE George Kittle, Iowa
Fifth round, No. 177: WR Trent Taylor, Louisiana Tech
Sixth round, No. 198: DT D.J. Jones, Mississippi
Sixth round, No. 202: DE/OLB Pita Taumeopenu, Utah
Seventh round, No. 229: DB Adrian Colbert, Miami

The 49ers also announced the signings of 18 undrafted rookies to the mandatory three-year contracts:

QB Nick Mullens, Southern Mississippi
TE Cole Hikutini, Louisville
DB Lorenzo Jerome, Saint Francis (PA)
RB Matt Breida, Georgia Southern
OL Erik Magnuson, Michigan
WR Kendrick Bourne, Eastern Washington
OT Darrell Williams Jr., Western Kentucky
WR KD Cannon, Baylor
WR Victor Bolden, Oregon State
LB Jimmie Gilbert, Colorado
OL J.P. Flynn, Montana State
DE Noble Nwachukwu, West Virginia
LB Donavin Newsom, Missouri
OL Bret Treadway, Lamar
FB Tyler McCloskey, Houston
S Malik Golden, Penn State
OL Evan Goodman, Arizona State
DB Zach Franklin, Washburn

49ers sign six draft picks, 18 undrafted rookies

49ers rookie quarterback Beathard benefits from running pro-style offense

Source: 49ers release 2015 fourth-round draft pick

Three former 49ers, including Mike Purcell, claimed off waivers

Report: Reuben Foster's shoulder caused draft fall

SANTA CLARA – While other quarterbacks around college football were putting up astronomical statistics in their spread offenses, C.J. Beathard compiled relatively pedestrian numbers.

But that was all part of his plan. And it paid off last week when the 49ers traded up into the end of the third round to select the Iowa quarterback with the No. 104 overall draft pick.

“When I came out of high school, I wanted to play in a pro system because I knew that translated a lot better to the NFL,” said Beathard, who arrived in the Bay Area on Thursday and was issued No. 3 with the 49ers.

Coach Kyle Shanahan said he was drawn to Beathard, in part, because he saw him in college running an offense that is more adaptable to the NFL.

“One thing that helps is being able to see guys play the way you’re going to ask them to play,” Shanahan said. “I think that helps with being at Iowa, having watched the system that he’s in. it’s easier to see.”

Beathard said Iowa coach Kirk Ferentz and offensive coordinator Greg Davis placed a lot of trust in him to make checks at the line of scrimmage and read defense. He also took snaps under center and called plays in an actual huddle.

Beathard threw for 1,929 yards in his senior season, completing 170 of 301 pass attempts with 17 touchdowns and 10 interceptions. In comparison, first-round pick Patrick Mahomes completed 388 of 591 attempts for 5,052 yards with 41 touchdowns and 10 interceptions.

“It is frustrating sometimes,” Beathard said. “Those guys are throwing for 300 yards a game. But all’s that matters to me is really winning games and over the course of my two years starting, we were 12-0 in the regular season my junior year, and 8-4 last year.

“Obviously, didn’t finish the way we wanted to, but overall we had a successful two years. I’d rather than win a game and throw for 150 yards than lose and throw for 300.”

The 49ers selected Beathard's teammate, Iowa tight end George Kittle, on Day 3 of the draft.

“He basically willed us to 20 wins in two years, so that’s pretty impressive,” Kittle said. “He put the team on his back multiple times in games we might not have been playing well. He’s a guy, when he steps on the field, he steps on the field to win. You look at stats, numbers, it doesn’t really matter because he’s a guy who’s going to get the job done.”

After selecting Beathard to join Brian Hoyer and Matt Barkley on the 49ers’ depth chart, Shanahan cited Beathard’s accuracy. But Shanahan said he looked beyond the less-than impressive 56.5 completion percentage that Beathard compiled as a senior.

“When I look at accuracy, do they throw where they’re trying to throw? You can call a bunch of bubbles and a bunch of quick screens and stuff and you can have someone be the most accurate completion percentage quarterback in the world,” Shanahan said. “That doesn’t mean that they can throw the ball all the time where they want to go. I look at when a guy’s in tight coverage, what shoulder does he put it on? How consistently does he hit a guy in stride? When guys aren’t open, it’s sometimes hard to get completions. It depends on the type of offense you have.

“They’re a little more NFL based where they’re not doing a bunch of bubbles and things like that. They do run the ball a ton. They do a lot of play-action keepers off of it and it’s tough to get completions, though. They’re harder completions. There’s not as many gimme ones and I think when you talk about completion percentage, you’ve always got to look into that.”