It’s very difficult for an offensive lineman to be inducted into the Hall of Fame in his first year of eligibility. It is an especial burden on interior players, as it tends to be the tackles who draw the most attention going up against the league’s elite edge rushers responsible for the bulk of most defense’s sack production.
There are many great linemen who were deserving of being first-ballot Hall of Famers who were not. The Pittsburgh Steelers know a couple of them quite well, including one that is currently on their coaching staff and one who played for them for many years.