Prater tacked on a 30-yard field goal to put Detroit up 20-3 with 32 seconds until intermission - a score that remained in effect at the midway point.
The Packers played without many of their best players, and further hurt their changes with three turnovers in the first half.
Score is 20-3 Lions at the half. In the first quarter alone, the Packers lost - at the most - 14 points.
Ameer Abdullah's 7-yard run accounted for the Lions' final touchdown.
The turnovers were the lowest point of the day and potentially the season for Hundley, who hadn't thrown an interception in a road start this season until Sunday.
In a game full of huge plays, let's give the Player of the Game award to a standout youngster already getting us excited for next year: Kenny Golladay. "We just stopped ourselves". His passer rating at halftime is 120.7.More news: PM Modi urges nation to start 2018 with positive spirit
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The Steelers have been favored by double digits twice this season (minus-10 at Cleveland on September 10 and minus-11 at Indianapolis on November 12) and won each of those games by only three points. Obviously, it didn't end the way we wanted it to. We finished 7-9, that's not what you want. "We didn't make the plays that needed to be made".
"From here, we just have to regroup and figure some stuff out and go from there". However, the Lions were eliminated from playoff contention last week with a loss to the Cincinnati Bengals and haven't won a playoff game with Caldwell as head coach. For now, he was Hundley's backup and despite desires that have been well-voiced amongst fans, has yet to see the field.
But it wasn't almost enough against an efficient Stafford (20-of-29, 323 yards, three TDs, 140.4 rating) and a fast, stunting Lions pass rush, once both got going. He averaged 1.6 yards per completion, essentially silencing the Callahan Crowd - at least for now.
"We practiced it a bunch, so I've caught it a bunch", Stafford said after the game, when asked what was going through his mind when the ball was in the air.
The Lions also swept the Packers for the first time since 1991 and Caldwell became the first Lions coach since Buddy Parker to have three winning seasons in his first four years as head coach from 1951 to 1954. "It was fun, it was exciting". There are great times, there are low moments.