Mongrel is the third studio album by American rock band the Bob Seger System, released in 1970.

Ben Edmonds called the album "...easily Seger's best work to date, but there are still some crucial musical problems he must come to grips with if he is to realize the tremendous potential he displayed on his earlier Cameo-Parkway singles (most notably 'Heavy Music' and 'Persecution Smith')."

Edmonds continued: "Seger writes marvelous rock and roll songs in the virile 1965 mold, somewhat of a lost art these days."

Edmonds called "Lucifer" the strongest cut on the album,[5] but his review may have had a dampening effect on sales.

[citation needed] All tracks are written by Bob Seger, except where notedAlbum - Billboard (United States) Singles - Billboard (United States)