Glover's personal best winning throw, 268 feet, bettered his own season-leading mark for a U.S. collegian by one foot, 3 inches. He had gone into the final group of nine throwers with just the third-best throw, 247-5.
"I just kind of recharged my battery a little bit, went out there and sped up and threw harder," Glover said of the big improvement.
Sam Humphreys of Texas A&M was second at 261-2.
Glover, from Normal, is known as "Tiny Tim" because he is 5 feet, 10-inches and 215 pounds, relatively small for an elite thrower.
He joined high jumper Tom Smith (1987-88) as the only Redbirds to win consecutive NCAA track titles.