Dallas Cowboys v Philadelphia Eagles | Mitchell Leff/GettyImages

It is hard to come away from the Dallas Cowboys’ 41-7 loss to the Philadelphia Eagles with any vexation. While it absolutely stinks to get shellacked by a hated rival, the team Dallas fielded on Sunday was a shell of the one that started the season in September.

Even without Jalen Hurts, backup Kenny Pickett and third-stringer Tanner McKee, who replaced Pickett after he was removed following a big hit from Micah Parsons, combined to average 10.4 yards per pass and three passing touchdowns with a 141.9 passer rating.

After starting the game with two punts, Eagles offensive coordinator and old friend Kellen Moore identified the weakness in Dallas’ secondary: cornerback Andrew Booth.

Cowboys CB Andrew Booth’s PFF grade after dreadful showing is a sight to behold

With DaRon Bland shadowing A.J. Brown, who finished with just three catches for 36 yards, Booth was tasked with covering DeVonta Smith. Smith is one of the best WR2s in football and he predictably terrorized Booth all game long.

Booth was actually benched in the second half and checked back in only to get burned again by Smith for a 25-yard touchdown in the fourth quarter to make the score 41-7.

Acquired in a preseason trade with the Vikings, Booth finished with a 29.2 coverage grade and 38.7 player grade, via Pro Football Focus (subscription required). But it doesn’t end there.

READ MORE: Micah Parsons gets brutally honest about Cowboys’ future after demoralizing loss

The former second-round pick allowed five catches on six targets for a whopping 111 yards and two touchdowns. He conceded 22.2 yards per catch and was responsible for 35 yards after the catch. Pickett and McKee had a combined 158.3 passer rating when targeting Booth. In case you were wondering, 158.3 is a perfect passer rating in the NFL.

To add insult to injury, Booth committed a needless illegal contact penalty that wiped out Marist Liufau’s forced fumble on Pickett. While the Eagles jumped on the loose ball, they would’ve had 3rd-and-14. Instead, they got an automatic first down and scored a TD seven plays later. Coincidentally enough, Booth was in coverage on the score.

In a perfect world, Booth wouldn’t have seen the field on Sunday. Speaking strictly in terms of cornerback, the Cowboys were without Trevon Diggs, Caelen Carson, Josh Butler and Amani Oruwariye. Diggs obviously sits atop the depth chart, while Butler, Carson and Oruwariye make up the fourth, fifth and sixth spots on the depth chart, respectively.

Booth now owns a 28.7 coverage grade for the season on 62 coverage snaps. That is the lowest grade among 157 qualified cornerbacks, per PFF. He’s allowed the second-highest passer rating (157.1) and second-most yards per reception (17.4)

We understand why Dallas has kept Booth around, but moving on has to be among the team’s first moves once the season ends. The experiment, while not expensive, has been a disaster.