I don’t know what sportsbook your using, but some sportsbooks offer progressive moneyline parlays. The best in the biz is 5Dimes. You can check it out here for the best odds and payouts on progressive football parlays and teasers.

I didn’t know they didn’t.

I only use one site, and it has it.

I can’t think of a reason, other than perhaps they aren’t a popular bet, so they don’t bother having them.