The Philadelphia Eagles and New England Patriots meet in Super Bowl LII in Minneapolis. The Patriots are 4.5-point favorites, down one from where the line opened. The Over-Under, or total number of points oddsmakers think will be scored, is 48.5, up a half-point from the opener.

Before you pick the NFL's biggest game, you need to see what Mike Tierney has to say.

In the NFC Championship Game between the Vikings and these same Eagles, Tierney told SportsLine readers to back the Over (38). He correctly said that the total was the lowest in 13 years and that Eagles quarterback Nick Foles would lean on wide receiver Alshon Jeffery. The result: 45 total points and two touchdowns from Jeffery.

Strikingly, that improved Tierney to 52-29 picking NFL totals. Anyone who has followed his lead is way up.

Part of his success: No one knows the NFL like Tierney. A national sportswriter whose work appears in the New York Times and Los Angeles Times, he has reported from seven Super Bowls. And he knows what matters most in the most-bet game of the season.

Now, Tierney has evaluated Super Bowl LII from every possible angle and locked in a strong Over-Under pick for Patriots vs. Eagles. You can only see it at SportsLine.

Tierney knows that the 2018 Super Bowl features two of the league's top scoring defenses. The Eagles allowed just 18.4 points per game during the regular season, good for fourth in the NFL, and have allowed 17 total points in two playoff games against the Falcons (10) and Vikings (7).

Meanwhile, the Patriots allowed just 18.5 points per game in the regular season, good for fifth in the NFL, and haven't given up more than 20 points since Week 15.

But just because the Patriots and Eagles boast top-five defenses doesn't mean Super Bowl 52 goes Under.

The offenses are prolific as well. These two teams finished tied for second during the regular season at 28.6 points per game. And Foles just threw for over 350 yards and three touchdowns against one of the league's top defenses in the NFC Championship Game. Brady has five total touchdowns in the postseason so far.

Tierney has evaluated all of these angles and while he's leaning on the Eagles to cover the spread, he knows there's a huge x-factor that ultimately determines whether Eagles-Patriots goes Over or Under. And he's sharing it over at SportsLine.

So which side of the total should you back in Eagles-Patriots in Super Bowl LII? Visit SportsLine now to see what big x-factor sends Eagles vs. Patriots Over or Under, all from the expert cashing on almost 70 percent of his NFL totals picks since the start of last season.