Recently, we covered several NFL free agents who should throw in the towel and retire. Some of the older guys on that list have played well past their career years and are tumbling downhill at breakneck speed.

On the other side of the spectrum, some rare long-time veterans don’t seem to be phased at all by the aging process.

For example, the league’s oldest running back achieved his ninth 1,000-plus rushing yard season just last year. Meanwhile, a certain veteran linebacker recently inked a deal that locks him up with his team through his 40th birthday.

On that note, here are eight greybeards who will continue to dazzle throughout the 2017 NFL season.