Official Splits: 61.54 - 60.88 - 60.08 - 56.8
This was the second high school sub-four time produced by the meet after Grant Fisher ran 3:59.38 in 2015. Brown competed in the professional mile field, which was won by University of Wisconsin standout Morgan McDonald.
According to the official splits, Brown's last 400m was run in a blistering 56.8 seconds.
Brown's sub four makes him the 10th high schooler ever to break the elusive barrier. For a time, however, it seemed that wouldn't happen this season. Three athletes had run 4:00 this year -- Cooper Teare, DJ Principe, and Sam Worley.
But Brown gave a good glimpse into his fitness at the UIL Track and Field Championships. Just one week ago, he ran 4:02.49 for 1600m to place second behind Worley.
A Foot Locker Cross Country National Champion, Brown just added to his legacy Thursday.