It appears likely the Vikings are moving on from Sam Darnold as their No. 1 quarterback and replacing him with J.J. McCarthy as the starter for the 2025 season. So, who will back up McCarthy?
Nick Mullens, the 29-year-old who backed up Darnold last year when McCarthy was injured and out for the season, has been with the Vikings since 2022, knows the offense and is a personable leader. But in his six-season NFL career, Mullens has thrown 31 interceptions in 34 games, including double-digit totals in two eight-game seasons starting for the 49ers.
“No, I don’t trust Nick Mullens,” a former executive with NFL teams told Sports Headliners. “I know he had a couple snaps last year and did okay, but we saw enough of him the year before to know that he’s a turnover machine (eight picks in 148 pass attempts).”
The source, asking that his name not be used, indicated the importance of a worthy backup is accentuated by McCarthy’s injury history as a rookie in 2024 who played in one preseason game before injuring his knee. He suggested it’s on the Vikings to find a higher-level talent with experience to be the No. 2 QB. Among names he mentioned were 27-year-old Daniel Jones who Minnesota acquired last fall and might re-sign in the offseason as a free agent.
The authority, who still follows the NFL closely including the Vikings, is okay with Mullens as No. 3 on the QB roster. He points out that Minnesota head coach Kevin O’Connell likes Jones and said that if he were in charge he would offer the former Giants 2019 first-round draft choice a two-year deal at $12.5 million.
Prior to joining the Vikings in late November, Jones completed 64.1 percent of his career passes for 14,582 yards, 70 touchdowns and 47 interceptions. A starter for 10 games with the Giants in 2024, he has 2,179 career rushing yards and 15 touchdowns on 399 carries.

The Vikings have until 4 p.m. Tuesday to franchise tag Darnold, if that’s their intent. The move might cost Minnesota about $40 million and it’s believed the Vikings would do so only if they thought they could trade him for a high future draft choice. If they can’t move Darnold, then Minnesota would be stuck with the $40 million, eating up perhaps two-thirds of the franchise’s salary cap room to sign other players.
Darnold resurrected his pro career in his initial season with Minnesota. The Sporting News and Professional Football Writers Association of America both named him league Comeback Player of the Year for his 2024 production that included career highs in several passing categories.
Darnold led the Vikings to a 14-3 regular season record but disappointed in the two biggest games of the year. With the NFC No. 1 seed in the playoffs at stake, Darnold and the Vikings lost in their regular season finale to the Lions and then failed to win in Minnesota’s opening playoff game against the Rams. In the Lions game he twice missed a wide-open Justin Jefferson in the end zone. He was a combined 43 of 81 passes in the two games and was sacked nine times by the Rams.
The way Darnold played in his last two games tempers enthusiasm and interest in the 27-year-old who until 2024 had been an NFL journeyman. “It was so disappointing how he played at the end,” the source said. “I mean, really just killed them (Vikings’ chances).
“That’s why I say how can you put big money into a guy if you can’t trust him to win a big game? And you got a young guy (McCarthy) you picked 10th overall who you expect to be the future, and you got a coach who is a great quarterback coach.
“That’s why it all makes sense that it’s going to be turned over to McCarthy. I’ll be surprised if that’s not the case. And I expect some team to probably give Darnold a decent deal and I don’t think the Vikings are going to try to match that. It would make no sense unless they didn’t have faith in McCarthy, which I think they do.”
Could Darnold raise his game to be elite on the biggest of stages? “It’s possible because we didn’t think he’d get to what he did last year in the first 16 games.” the authority said. “But you invested in a first-round pick and you think that guy is special, which potentially I think he could be.
“And the one thing about McCarthy, in the big games (in college) he was clutch. National championship, playoffs.
“And that’s what Darold wasn’t was clutch at the end. So to me, you cut the cord. …”
It’s thought that Darnold will seek a multi-year deal as a free agent with any one of several teams, with perhaps the Raiders and Steelers the most likely of suitors. Would they be willing to pay $35 to $40 million per season?
The Vikings, with their own free agent needs, are likely to spend cap money on re-signing players like cornerback Byron Murphy Jr. And shopping in free agency for help in the interior offensive and defensive lines, and at cornerback.
O’Connell seems committed to McCarthy who he referred to last year as the “young franchise quarterback.” The 22-year-old, who was 27-1 as a starter at Michigan and has an ideal NFL QB physique at 6-foot-3 and about 220 pounds, apparently is successfully rehabbing from knee surgery. He likely impressed teammates and coaches last year in the spring and summer with his physical skills and leadership.
The authority thinks the Vikings have long had a plan to make McCarthy the starter in year two of his NFL career. The bigger issue now looks like who will be his backup.
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