Only 20 quarterbacks in NFL history have played into their 40s, and Tom Brady and Brett Favre are two of them. Favre, a 2016 Pro Football Hall of Fame inductee retired (the second time) at 41, so if anyone knows what it's like to play at that age, it's him.

In a recent interview with TMZ, Favre admitted that New England Patriots quarterback Tom Brady has not declined in recent years as he ages.

“Tom and I have had conversations over the last two or three years, after the season was over, where I felt the need to tell him my opinion, and I felt like his game had not declined one bit, and I feel the same way this year,” Favre told TMZ.com. “I hear a lot of so-called experts say his age is catching up with him. I don’t see that. I see a quarterback still doing what he does but the cast around him was not up to par.”

Brady, now 42 years old, helped lead the Patriots to a 12-4 regular-season record, completing 60.8 percent of his passes for 4,057 yards, 24 touchdowns, and eight interceptions.

While Brady's 24 touchdowns is his lowest total since 2006, that level of production is quite impressive for someone his age.

Comparatively, in Favre's final season with the Minnesota Vikings in 2010, the Gunslinger threw for just 2,509 yards, 11 touchdowns, and 19 interceptions.

Brady's future with the Patriots has been debated this offseason with many experts thinking he might retire. Regardless, Brady, while maybe not an MVP-caliber player anymore, is still considered one of the better quarterbacks in the league — even at the ripe age of 42.