|Born:||May 22, 1996|
|Height:||6 ft 4 in (1.93 m)|
|Weight:||217 lb (98 kg)|
|High school:||Sandy Creek High School|
|* Offseason and/or practice squad member only|
Sumpter caught 27 passes for 423 yards and four touchdowns his senior year at Sandy Creek High School in Tyrone, Georgia. In addition to football, Sumpter lettered in basketball and track and field.
His one-handed catch against Liberty in 2017 was featured as ESPN's top play of that week.
Sumpter was invited to and participated in the 2019 College Gridiron Showcase college football all-star event.
- "Justin Sumpter - Football". Kennesaw State University Athletics. Retrieved 2019-01-08.
- "Big South Announces 2016 Football Annual Awards". Big South Conference. Retrieved 2019-01-08.
- "Big South Announces 2017 Football Annual Awards". Big South Conference. Retrieved 2019-01-08.
- "Big South Announces 2018 Football Annual Awards". Big South Conference. Retrieved 2019-01-08.
- Tyler Duke, For the AJC. "Justin Sumpter helps put Kennesaw State on national stage". ajc. Retrieved 2019-01-08.
- "2019 CGS College Gridiron Showcase Rosters". College Gridiron Showcase. 2019-01-02. Retrieved 2019-01-08.
- Simmons, Myles (April 30, 2019). "Rams agree to terms with five undrafted free agents". TheRams.com.
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