This was the cover of Sports Illustrated the week the Lions last won the NFL championship.
https://vault.si.com/vault/1958/01/06/all-hail-the-lusty-lions
It was the last Sunday of 1957, but despite the season it was an absolutely perfect day to play football. The sun was shining, the air was almost balmy and the seams of Briggs Stadium in Detroit were near to bursting with the 55,263 people who were willing to pay up to $10 apiece to watch their home-town Lions play the Cleveland Browns for the national professional football championship. As these once shunned and unwanted Lions racked up touchdown after touchdown, it seemed that Briggs Stadium could hardly contain the civic joy, but that is getting ahead of the story....
Two days earlier on a cold, blowy midnight, a line of people on Michigan Avenue in downtown Detroit stretched off into the darkness. One man was wrapped in an old multicolored quilt and another had a brown Army blanket draped tastefully over his shoulders. It was a good-natured line, and when a radio announcer asked the man in the quilt if he thought the Lions had a chance to win the following Sunday, the man said at the top of his voice, "We'll kill the Browns." The line cheered and continued to wait patiently to buy tickets to the game....
Governor G. Mennen Williams wired the commissioner of the National Football League and earnestly asked that the Lion-Brown championship game be put on television since it was a sellout. Bell refused (see page 22). Representative Thaddeus Machrowicz, of Detroit, wired the commissioner and pleaded passionately that the game be put on television. Bell refused. A filling station operator spent $200 to have an outsize aerial put on his service station and entertained his customers with the telecast of the game, picked up from 75 miles away; he too watched and didn't sell any gas....
That was Detroit before the Lions entertained the Browns. Like San Francisco the week before, when the Lions played the 49ers for the right to be in the championship game, Detroit was a hysterical city. Quarterback Tobin Rote was bigger than General Motors. Coach George Wilson was more important than the new Fords and Chryslers, and a ticket to the championship game was about as valuable as a Cadillac....
Detroit has always liked professional football. Detroit is a lusty, thriving, vigorous city and it has found a soul mate in the lusty, thriving, vigorous game. This year's Detroit Lions have endeared themselves to Detroit for a number of reasons, some of them logical.
Maybe the biggest reason was the innate American love of the underdog; the Lions fulfilled the role of underdog to a T. They, started the season by losing a coach. Buddy Parker, the moody, intense man who had guided the club to two world championships, announced as the season was about to begin: "I have a situation here I cannot handle. This is the worst team in training camp I have ever seen. The material is all right, but the team is dead. I don't want to get involved in another losing season, so I'm leaving Detroit football. I'm leaving tonight." He said this at a Detroit Lions boosters banquet, then stepped down from the podium and left. So the Lions had one big strike against them, and quite a few football fans figured the second strike followed immediately when the club named George Wilson as head coach to replace Parker.