The Pittsburgh Steelers possess the NFL's premier defensive line as they approach the 2025 season. With T.J. Watt and Cameron Heyward at the forefront, both of whom have achieved remarkable PFF grades, they are complemented by rookie Derrick Harmon, enhancing a unit that's already regarded as elite. Meanwhile, the Philadelphia Eagles continue to impress, led by young stars Jalen Carter and Moro Ojomo, maintaining a formidable pass rush even after key departures.

Other teams like the New York Giants and Houston Texans are making significant strides on their defensive fronts. The Giants bolstered their lineup with high draft picks and a strong nose tackle, while the Texans boast a powerful edge duo. As teams strive for dominance in the trenches, these defensive lines will be crucial for their success in the upcoming season.