Over the course of the 2019 season, the Pittsburgh Steelers had a two-time Pro Bowler at left tackle in Alejandro Villanueva while starting Matt Feiler on the opposite side, who started 10 games there the previous season. Their reserves were 2018 third-round pick Chukwuma Okorafor and Zach Banner, a former fourth-rounder who was brought in during training camp in 2019.
Villanueva, Feiler, and Banner will all be unrestricted free agents in 2021, should they not receive extensions between now and the start of the 2020 season (Feiler and Banner were both restricted free agents; Feiler was tendered, while Banner received a one-year deal for an amount lower than the tender).