Update: Even DeAngelo Williams's coach thinks it's ridiculous for the running back to criticize future Hall of Famer Peyton Manning over a lackluster 2015 season.

After all, the season did end with Manning and the Denver Broncos winning Super Bowl 50, and there's no disputing Peyton as one of the best quarterbacks to ever play the game.

Seeing enough of his player's pettiness, Pittsburgh Steelers coach Mike Tomlin took to his own Twitter account to ask Williams to stop the madness.

Let him know, Coach!

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Previously: To refute that Peyton Manning is an undoubted Hall of Famer would be silly.

DeAngelo Williams isn't going to bother doing that. Instead, the Pittsburgh Steelers' running back is just stressing the fact that Manning had a rather paltry 2016 season.

And Williams chose Monday, when Manning announced his retirement from the NFL, as the apt time to state his case.

Take a look at his Twitter rant below.

OK, DeAngelo... we hear you. 

The Denver Broncos' dominating defense carried Peyton and the squad to a Super Bowl 50 victory last month. There's no doubt about it. They should be credited more than a past-his-prime Manning for last season.

That and the same Broncos defense made up for Manning's mistakes at several points through the season, as the 39-year-old quarterback was a shell of his former self in his 18th season.

But here's the thing, DeAngelo... you're pointing out the obvious.

Who's disputing that the Broncos defense carried Peyton and the team to victory?

Who's disputing that Manning's final season was just OK?

But you said it yourself with your Twitter rant — he's a Hall of Fame QB. So, what's the point of stating some of the obvious parts of this season?

It just comes across petty, man.

When it comes to Peyton Manning, his complete body of work is always going to outweigh his performance this season.

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(Photos from left: Kevin C. Cox/Getty Images, Doug Pensinger/Getty Images)