This undeniable x-factor will make or break Louisville football's fate vs Virginia

Pro Football Focus just exposed Louisville football's one concerning weakness ahead of a crucial ACC showdown with Virginia.
Matt Stone/Courier Journal / USA TODAY NETWORK via Imagn Images

Louisville football is 4-0, and the Cardinals are coming off a thrilling win over Pitt. The Cardinals were down 17-0 after the first quarter, but thanks to an explosive second half from Miller Moss and Chris Bell, Louisville clawed back and pulled out a massive victory over Pitt.

Now, Louisville's ACC Title hopes are still alive, but they have an even tougher challenge ahead of them this weekend against Virginia. The Cavaliers are coming off an overtime win over Florida State and have skyrocketed up in the AP Polls, now ranked No. 24. This weekend's showdown is crucial for the Cardinals' season, and with all eyes on this ACC matchup, Pro Football Focus just revealed the one flaw Louisville must improve in if it wants to pull off the upset.

Related: AP Poll reveals Louisville football is entering season defining stretch

Proo Football Focus revealed Louisville's one concerning weakness

The Cardinals' offense has been one of the top offenses in the nation, thanks to Isaac Brown and these elite playmakers. However, there is no question that the offensive line has been a huge concern, and they must play better as the season progresses.

Max Chadwick and Dalton Wasserman recently previewed the Cardinals and Cavaliers showdown, and Chadwick was quick to mention that Louisville must solve its "serious issues" up front.

"Their offensive line grade is 58.8, that is 109th in college football," Chadwick stated. "They are 93rd in pass-blocking grade this year in the country. They are 121st in run blocking grade this year, right now."

Louisville fans have been screaming for their star running back and Preseason All-American to get the ball more, as they have only run the ball on 42 percent of their plays this year. However, with this run-blocking offensive grade, it is clear why they don't do it as much. The Cardinals' offensive line faces a significant challenge this weekend, as the Cavaliers' defense ranks No. 27 in PFF metrics and No. 24 in run defense.

Brohm made it clear he wants the offensive line to step up, as in his recent press conference, he stated, "I think we can block better, and I think we've got to be able to react to movement up front and blitzes, and people playing downhill a little bit better. We got to work hard this week to make sure we do that."

The Cardinals' offense has shown flashes of brilliance, but the offensive line has been an area of concern throughout the entire season. With the Cavaliers coming to town this weekend, this group must step up and deliver a statement performance, as the schedule only gets tougher.

Related: Pat McAfee fires up Louisville and Virginia fans after Cardinals' stunning comeback

Louisville and Virginia will kick off next Saturday, October 4, from L&N Stadium at 3:30 p.m. local time.

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