Peyton & Eli Manning -- Good Cop, Better Cop

Bad boys, bad boys, whatcha gonna do ... whatcha gonna do when you no longer have steady gainful employment????

Peyton Manning and younger brother Eli were spotted in Brooklyn last month sporting police uniforms for a video shoot.

TMZ spoke to a rep from DirecTV who tells us the whole thing is part of a project for DirecTV -- but insisted it's NOT a commercial.061011_manning_still

We're told Eli had one really great performance ... but Peyton was far more consistent.