Though she didn't advance to the finals in the 100 m or 200 m, she won her first national championship in the relay, setting a new Hayward Field record of 42.65 seconds.

[7] At that year's Southeastern Conference outdoor championships, Johnson set an NCAA record and world under-23 best in the 4 × 100 m relay.

[2] It was her final national title, as during her senior season's outdoor championships her 4 × 100 m team lost to the USC Trojans.

[2] Johnson competed at the 2019 USA Outdoor Track and Field Championships in the 100 m, but she placed 6th in her semi-final and did not advance to the finals.

Running with Courtne Davis, Kiara Parker, and Kyra Jefferson, her team placed 2nd, losing only to the other U.S.