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John Kirkwood "Jack" Matthews was a houseguest on Big Brother 21 (US).

Despite positioning himself well during the first few weeks of the game as the figurehead leader of Gr8ful, Jack was controversial because of his comments made towards and about other houseguests. A huge blowup in week 5 pitted him against his closest ally Jackson Michie. After Jessica Milagros won Head of Household in week 6, she decided to target Jack and Jackson. Jack was evicted in a 6-2 vote, finishing in 11th place becoming the first member of the jury.

During his post-eviction interview, Julie Chen-Moonves questioned Jack about his controversial behavior.


Jack Matthews Biography

Age: 28
Hometown: Chicago
Current city: Tampa, Florida
Occupation: Fitness Trainer
Three adjectives that describe you: Honest, integrity, and character.
Favorite activities: CrossFit, photography, and hanging with my dog Layla.
Do you have a strategy for winning the game?
Be honest, have integrity, and good character.
My life's motto is...
"Keep it simple."
What would you take into the house and why?
- My dog, Layla.
- Camera.
- Music.
Fun facts about yourself:
- I can snatch 275 lbs. (Olympic weightlifting jargon).
- I can wiggle my ears.
- I have pretty large hands for my height.
- I like to sing. I think I'm good at it when I'm by myself.
- I can walk on my hands for quite some time.[2]

Player History - Big Brother 21 (US)[]

Competition History[]

Week 1 Hit The Road Ineligible
HOH Loss
Whacktivity Ineligible
POV Loss
Week 2 HOH Win
Whacktivity Win
POV Loss
Week 3 HOH Previous HOH
Whacktivity Ineligible
POV Not Picked
Week 4 Comeback Ineligible
HOH Loss
POV Loss
Week 5 HOH Loss
POV Not Picked
Week 6 HOH Loss
POV Loss

Have/Have-Not History[]

Week 1 Phase Not Active
Week 2
Week 3
Week 4 Have
Week 5 Have
Week 6 Have/Have-Not Phase Over

Voting History[]

Week Position Voted for With Majority?
1 Camp Director Jackson Michie Yes
Ovi Kabir Yes
3 Cliff Hogg III Yes
4 Nominated
5 Sam Smith Yes
6 Nominated
Finale Jury Member Jackson Michie Yes

HOH History[]

Original Nominees Post-Veto Nominees Intended Target
Week 2
Kemi Fakunle

Post Big Brother[]


  • Jack is the only person who won a Whacktivity Competition to activate the power he won.
  • Jack always voted with the majority.


  1. List of Big Brother 21 houseguests (U.S.). Wikipedia. Retrieved on 25 June 2019.
  2. Jack Matthews. CBS Big Brother (21 June 2019). Retrieved on 21 June 2019.
Big Brother 21 (US) Houseguests
BB21 Small Jackson
BB21 Small Holly
BB21 Small Nicole
BB21 Small Cliff
BB21 Small Tommy
BB21 Small Christie
BB21 Small Jessica
BB21 Small Nick
BB21 Small Analyse
BB21 Small Kathryn
BB21 Small Jack
BB21 Small Sam
BB21 Small Isabella
BB21 Small Kemi
BB21 Small Ovi
BB21 Small David
Jury Member