The Giants could be getting the best linebacker they have had in decades . . . as a coach.

Hall of Famer Mike Singletary, a 10-time Pro Bowler during his playing career with the Bears, is interviewing to become the Giants’ linebacker coach on Thursday, a source confirmed to Newsday. Singletary also has coaching experience; he was head coach of the 49ers from 2009-10 and was last with the Vikings as their linebackers coach from 2011-13.

Singletary and Giants coach Ben McAdoo were on the same 49ers staff in 2005.

The Giants have not had a Pro Bowl linebacker since Antonio Pierce in 2006. Injuries have hampered the more talented of their players at the position in recent years — Jon Beason played only eight games in the past two seasons and Devon Kennard missed seven games in 2015 with calf and foot injuries — while the Giants had to rely on players such as Jonathan Casillas, Mark Herzlich, Jasper Brinkley and Uani ’Unga to fill starting roles this season.

The Giants have not selected a linebacker in the first round of the draft since Carl Banks in 1984.

Former Giants linebackers coach Jim Herrmann left the Giants and is now linebackers coach for the Colts.

The Giants could also be close to hiring an offensive line coach. Mike Solari reportedly interviewed for the position this week. Solari was most recently the assistant offensive line coach with the Packers under McAdoo mentor Mike McCarthy. He’s also coached offensive lines in Kansas City, Seattle and San Francisco.