Warren G Wise Up NY Giants ... Bring Back Eli Manning!!

Warren G is telling the NY Giants exactly what they need to do about the Eli Manning situation -- a situation that they totally screwed up -- telling TMZ Sports the Manning era should continue.

Here's a refresher, the Giants benched their 2-time Super Bowl MVP for Geno Smith, ending his consecutive games streak, lost the game, then fired the coach and GM. Nice.

Now it looks like Eli's job again, for now ... question is for how long? Will the organization stick with him?

We got Warren G leaving Poppy on a clear black night, with a clear white moon and asked the rabid football fan what he thought of the situation ... and he's got Eli's back like Nate Dogg had his (RIP).