The Biggest Loser eliminated two contestants and determined its three final weigh-in finalists during Tuesday night's penultimate episode of the NBC reality weight-loss competition's fifteenth season.

Chelsea Arthurs, a 28-year-old clinical research professional and event planner from Raleigh, NC, and Jennifer Messer, a 42-year-old clerk and bookkeeper from Abingdon, VA, were automatically ousted after they both fell below the red line by posting the two lowest weight-loss percentages of all the remaining contestants at the season's fourteenth elimination weigh-in.

In addition, David Brown, a 43-year-old construction company project manager and phone company social commerce leader from Edmond, OK; Bobby Saleem, a 28-year-old attorney from Chicago, IL; and Rachel Frederickson, a 24-year-old voice-over artist from Los Angeles, CA, were declared the season's three finalists who will weigh-in for the $250,000 grand prize and the title of "The Biggest Loser" during next week's live finale broadcast.

The Biggest Loser's penultimate episode began with the five remaining contestants competing in the show's first-ever triathlon, an event which featured a half-mile swim, a 12-mile bike ride and finally a three-mile run. The winner of the triathlon would automatically earn one of the three spots in the finale and also receive a brand new Ford vehicle.

Bobby really struggled with the swimming portion of the triathlon because he said he had never been good at swimming nor did he feel comfortable in the water. Rachel, however, found the swimming to be her strong suit because she had been a trained, professional swimmer for most of her life.

In the end, Rachel finished in first place with a time of one hour and 32 minutes. She would therefore be immune from elimination at the upcoming weigh-in.

David finished the triathlon in second place with a time of one hour and 57 minutes. Chelsea came in third with a time of two hours and 11 minutes. Following Chelsea were Jennifer in fourth place and Bobby in fifth place.

Last night's episode also featured updates on the weight-loss progress made by Tanya Winfield and Marie Pearl since leaving The Biggest Loser ranch.

Tanya began the show weighing 262 pounds and she currently weighs 174 pounds. She use to run a fast food restaurant in Illinois, but as of recently, she ditched the old job and plans to open a brand new restaurant soon with a focus on "healthy comfort food."

Marie started The Biggest Loser at 249 pounds and said she now weighs 150 pounds. Marie and her husband have been trying new adventurous things together, and Marie learned her chances of getting pregnant have increased drastically since losing all that weight.

Later on, the contestants, Bob Harper, Jillian Michaels and Dolvett Quince met host Alison Sweeney for the week's weigh-in. Alison explained there would be a red line and a double elimination, so the two people to post the lowest percentages of weight-loss would automatically be sent home. It didn't matter, however, what Rachel posted because she would be safe no matter what.

Rachel stepped on the scale first and lost one pound. She fell from 151 to 150 pounds.
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Chelsea dropped from 164 to 157 pounds, losing seven pounds and posting a 4.27% weight-loss percentage.

Jennifer lost three pounds and posted a 1.62% weight-loss percentage. She fell from 185 to 182 pounds.

Bobby dropped from 248 to 231 pounds. He shed a whopping 17 pounds and posted a 6.85% weight-loss percentage.

David then stepped on the scale and learned he had lost a total of 16 pounds. He fell from 259 to 243 pounds and posted a 6.18% weight-loss percentage.

Chelsea and Jennifer therefore fell below the red line and were eliminated. They will still be eligible for the $100,000 at-home prize.

"Having these 14 weeks on the ranch has given me the time to find that woman that I've been looking for, and I did. I found her and I can't wait to let everybody know that I am who I've been wanting to be now," Chelsea said following her ouster.

"I am thrilled. This part of my journey is now complete, and now I feel like I finished it strong to the end," Jennifer said.