1. Jack Lambert, 1976
The final spot on my list goes to the great Jack Lambert. In a history rich with Hall of Fame defensive talents, there's a case to be made that Jack Lambert was the best the Pittsburgh Steelers have ever had. The former 73rd overall pick played all 11 seasons in Pittsburgh and earned prestigious honors in all but his first and final year.
While we don't have tackle numbers from the '70s and '80s, it's safe to assume that Lambert would have dominated in this area. What we do know is that Lambert recorded 8 fumble recoveries, 3.5 sacks, and 2 interceptions in 14 games during his phenomenal 1976 season. His 20 Approximate Value was tied with only Rod Woodson for 1st ever by a Pittsburgh Steelers player.
Lambert crushed the competition in Defensive Player of the Year voting in 1976 -- earning 42 votes and DPOY honors. What's truly remarkable is that the stud linebacker also finished 2nd in the NFL in MVP voting behind Baltimore Colts QB, Bert Jones.
Jack Lambert was one of the best to ever play the position, and his 1976 season was quite arguably the best ever by a Pittsburgh Steelers player. This marked the first of 6 First-Team All-Pro honors for the legendary linebacker.
There are plenty of other players who deserve recognition for insanely good single seasons as members of the Pittsburgh Steelers, and some of the players could have made it for more than one season. At the end of the day, I think these are the ten best single-season performances in Steelers history.