"The Biggest Loser: Glory Days" Top 7 has reached the single-mode of the contest, where they must perform the challenges on their own, Nerdles reported.

The seven remaining contestants are aiming to be "The Biggest Loser" for this season, but they need to get back on track after the disappointing weight loss results in the previous week. Meanwhile, Bob Harper has been anxious in training the two former NFL players, Damien Woody and Scott Mitchell, at the Comeback Canyon.

The immunity challenge has become the highlight at the ranch. The contestants have to travel across a muddy track and field course filled with obstacles. At the end of the course, the contenders would have to re-create a color chart. Failure to get the correct hues meant a re-run on the course.

Despite her injury, Olympian softball player Lori Harrigan-Mack snatched the immunity with her color association skills, according to Buddy TV.

Toma Dobrosavijevic and Rob Guiry stood up as the biggest winners at the final weigh-in for the week. On the other hand, JJ O'Malley and Woody Carter have fallen below the yellow line. Luckily for Carter, Dobrosavijevic, Jordan Alicandro and Sonya Jones favored him while O'Malley packed his bags.

Meanwhile, NFL superstars Woody and Mitchell turned Comeback Canyon into a playground as Harper designed an NFL-themed course for their workouts. The final weigh-in showed a surprising result as Woody, who faced the course with enthusiasm, lost only two pounds and Scott with nine.

"I hate to lose," Woody said while on the scale. "But if I'm to lose to anyone, I'd rather it be to that guy right there," referring to Mitchell.

Mitchell will be competing against O'Malley for a spot in the finals the following episode.

"The Biggest Loser" will also be featuring their next episode with the top six enjoying the Hawaiian air on Dec. 18 at 8 p.m. on NBC.