The Denver Broncos opened as 28-point favorites over the Jacksonville Jaguars for next Sunday’s matchup, a spread believed to be the highest in NFL history.

Various sports books, including the Las Vegas Hotel and Casino, set the opening line at four touchdowns. Even if the spread gets bet down before next Sunday, it should still go in the books as the biggest ever.

#Broncos -28 hosting #Jags next week (biggest favorite ever!). Prior biggest: Steelers -26 hosting Bucs (12/5/1976) — RJ Bell (@RJinVegas) October 7, 2013

As we mentioned last week, there’s some debate about which spread is the current record holder. Due to variances in odds across various books, there’s no official mark. But, depending on who you ask, the unofficial record is either 23.5 (49ers over Bengals in 1993; Patriots over Eagles in 2007) or 24 (Steelers over Bucs in 1976) or even 26 (as Vegas insider RJ Bell references in the above tweet). Denver-Jacksonville should easily clear that.

Denver is 5-0 and has scored the most points in NFL history through five games, a total that includes a whopping 103 in the previous two games. The Jaguars are winless in 2013 and are threatening to become just the second team to finish with an 0-16 record.

Jacksonville failed to cover a season-high 19.5-point spread earlier this year against Seattle. On Sunday, the Jags were 12.5-point underdogs to the Rams and lost the game by 14.