I'd Bench Zeke For Tony Pollard

Ezekiel Elliott would be riding a whole lot of pine if Mike Martz were in charge in Dallas ... telling TMZ Sports he believes Tony Pollard should be the Cowboys' starting RB.

The former St. Louis Rams head coach said he'd make the change immediately if he were in Mike McCarthy's shoes ... explaining he believes Pollard is simply the best runner on the Cowboys -- and has been for a while now.

"Pollard is the better of the two backs," Martz said ... before adding, "I think Pollard has been more productive in the last three years with the opportunities that he's had."

Of course, Zeke has been entrenched as Dallas' RB1 since he was drafted in 2016 -- and hasn't moved off that spot, even though…