The kid was a star in HS.
American Junior Record Holder and ranked No. 4 on the World Junior all-time list (60mH)
Two-time (2015-16) New Balance Nationals Indoor champion (60mH)
2016 New Balance Nationals Indoor champion (pentathlon)
2016 USATF Outdoor Junior Championships bronze medalist (110mH)
2015 USATF Outdoor Junior Championships bronze medalist (long jump)
2016 New Balance Nationals Outdoor bronze medalist (110mH)
16-time individual VHSL state champion
And it looks like he'll live up to the hype. In his first meet, he ran the 300 in 32.94 (5th fastest time in college history, 2nd fastest by anyone under 20) and the 60mh in 7.63.
Here is an article on him in HS.
http://gridironnow.com/grant-holloway-has-eye-on-playing-football-for-florida/