The Pittsburgh Steelers have 556 losses all-time.

who did the seat steelers lose against
Interpreted as:
Who did the seat steelers lose in the regular season against?
TEAMGPLWTTDPTSPPGOPP PTSOPP PPG1DWN3DWN%4DWN%
Pittsburgh SteelersPittsburgh Steelers1220556643212,82224,16019.823,05518.920,865

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