Sources: Giants hire Brian Callahan to John Harbaugh's staff - ESPN

EAST RUTHERFORD, N.J. — The New York Giants are hiring former Tennessee Titans head coach Brian Callahan as their quarterbacks coach and passing game coordinator, sources told ESPN.

Callahan, 41, also interviewed for the position of offensive coordinator with the Giants. That job went to former Kansas City Chiefs offensive coordinator and Chicago Bears head coach Matt Nagy.

It now gives John Harbaugh a wealth of experience on a newly minted offensive staff that includes two former NFL head coaches in Nagy and Callahan, a former college head coach in offensive line coach Mike Bloomgren, and two other former offensive coordinators in senior offensive assistant Greg Roman and tight ends coach Tim Kelly.

Callahan was fired by the Titans in mid-October. He goes from working with last year's first overall pick Cam Ward to the second quarterback selected in the draft, Jaxson Dart. Coincidentally, former Giants head coach Brian Daboll is now coaching Ward as the offensive coordinator in Tennessee.

Before he was the Titans' head coach, Callahan had a long history of success working with quarterbacks. He spent two years as Matthew Stafford's quarterback coach with the Detroit Lions, a year with Derek Carr with the Las Vegas Raiders, and four seasons as the offensive coordinator for Joe Burrow with the Cincinnati Bengals.

Between Callahan, Nagy and Roman, they have spent recent years coaching Patrick Mahomes, Lamar Jackson, Burrow and Justin Herbert.

Callahan went 4-19 as a head coach with the Titans, including 1-5 this past season with Ward. Their offense scored only 83 points through six games, the franchise's fewest through six games since 1985, according to ESPN Research.

The frustration boiled over in Week 3 at Nissan Stadium