Cooper Kupp is going to bat for his quarterback ... saying there's NOTHING wrong with Jared Goff -- and promising TMZ Sports JG is going to be just fine next season!!
"We have all the faith in the world in Jared," the Rams superstar receiver says. "Absolutely love him."
Of course, a lot of L.A. fans ain't exactly feeling the same way ... Goff saw his QB rating dip nearly 15 points to 86.5 this season, his touchdown passes fall from 32 to 22 and his interceptions rise from 12 to 16.