Rich Gannon played the quarterback position for 17 years in the NFL. Some of that time was spent in a West Coast-style offense that has many of the same plays and tenets as what the Giants are currently running.

That's what makes it so disconcerting to hear what Gannon, now an NFL analyst for CBS, had to say Wednesday about quarterback Eli Manning after his five-interception game against the San Francisco 49ers.

"It's the type of interceptions, Mike, that really concern me," Gannon told WFAN's Mike Francesa. "Not seeing a opposing linebacker, throwing late down the middle. Some really bad decisions. That tells me there is something going on there. He's not comfortable. He doesn't have a great understanding of why they're calling plays in certain situations.

"I'd been really concerned if I were the New York Giants with what Eli Manning has done over the past 24 months."

The skid could reach six when they face the Dallas Cowboys (7-3) on Sunday at MetLife Stadium, especially if the veteran quarterback's play doesn't improve.

"Good football teams don't lost two in a row, let alone three in a row," Gannon said. "[Manning] looks out of sorts, and he's making some really poor decisions, which I am sure Tom Coughlin and the rest of that crew over there is really concerned."

Jordan Raanan may be reached at jraanan@njadvancemedia.com. Follow him on Twitter @JordanRaanan. Find NJ.com Giants on Facebook.