Found it...
https://www.saturdaydownsouth.com/ole-miss-football/metcalf-insane-catches-more-metcalf-2017/
Metcalf's relationship with his dad has been well-documented. It was the elder Metcalf who taught his son how to become one of the nation's top high school recruits. That started back when D.K. was doing sit-ups and pushups with his NFL dad as a 5-year-old. Before D.K. started first grade, he could bench press 100 pounds.