John Harbaugh is reportedly adding another former NFL head coach to his inaugural New York Giants offensive staff.

Brian Callahan, who coached the Tennessee Titans for 23 games from 2024-25, is joining the Giants as their quarterbacks coach and passing game coordinator, NFL Network’s Ian Rapoport and Mike Garafolo reported on Wednesday.

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Callahan will work under new Giants offensive coordinator Matt Nagy, who coached the Chicago Bears from 2018-21 and is coming off his second stint as the Kansas City Chiefs’ OC.

The 41-year-old Callahan has found a landing spot after being fired by the Titans just six games into this past season, his second as Tennessee’s head coach. He posted a meager 4-19 record in that role, but, before that, he enjoyed quite a bit of success as the Cincinnati Bengals’ offensive coordinator.

Callahan was with the Bengals from 2019-23. Serving under Zac Taylor, he helped Joe Burrow reach the Super Bowl as a second-year quarterback. Cincinnati ranked top 10 in points per game and passing yards per game in both 2021 and 2022, when the Bengals first made it to the big game and then returned to the AFC championship the following season.

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Most recently, Callahan worked with another top overall pick, Cam Ward. Now he’ll be tasked with harnessing the skill set of an additional first-round quarterback from last year’s draft: Jaxson Dart.

Dart impressed during his rookie season after the Giants traded up to select him with the No. 25 overall pick.

While he put himself in harm’s way too often, he established himself as one of the league’s more intriguing dual-threat signal-callers. Along with completing 63.7% of his passes and tossing 15 scores, he also ran for nine touchdowns during the 2025 campaign.

Callahan played quarterback at UCLA, and, since then, he’s been around some of the best NFL players at the position. He was an offensive assistant with the Denver Broncos when Peyton Manning threw 55 touchdowns and won a Super Bowl two seasons later. Plus, he was the quarterbacks coach for the Detroit Lions from 2016-17 and the then-Oakland Raiders in 2018. At those posts, he found himself lending a hand to Matthew Stafford and Derek Carr.

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That said, Callahan’s quarterback track record took a hit in Tennessee. Under his watch, Will Levis struggled mightily with turnovers, and Ward hardly hit the ground running.

Callahan will have the chance to hit the reset button in New York with Dart.