"Coach Fisher's been around for a long time," Gonzalez says ... "Obviously he doesn't trust him enough to even dress him ... so that says a lot right there."
Goff -- the #1 overall pick in the draft -- was listed as the 3rd string QB for Week 1 ... and was in street clothes as the Rams got blown out by the 49ers.
Fisher told the media he doesn't want to rush Goff -- even though the team traded SIX DRAFT PICKS to get him. Fisher had said he was pleased with Goff's progress.
Gonzalez played 17 seasons in the league -- and he says it comes down to one thing ... Goff had the entire preseason to win over the coaching staff ... and he blew it.