John Krasinski Believes In Garoppolo, Pats Will Go 4-0 Without Brady

No Brady? No Problem.

At least, Patriots superfan John Krasinski doesn't seem worried ... telling TMZ Sports his team will go 4-0 with Jimmy Garoppolo at the helm.

Jimmy had a pretty decent showing in the 1st pre-season game last weekend -- going 11-18 for 168 yards against the Saints.

Can he keep it up against the Cardinals, Dolphins, Texans and Bills??