The transfer from Arkansas Baptist College, Dyer was a former two-time 1,000-yard rusher at Auburn and was the 2010 BCS national championship game MVP for the Tigers.
But he didn't have the season expected.
Dyer was slowed by injuries and ran just 44 times for 223 yards and two touchdowns. He played in eight games but had his season cut short by an injury, which led to sports hernia surgery.
"It took him some time to get back this spring," new U of L coach Bobby Petrino said. "He was a little rusty."
It appears the rust is gone.
Dyer looked explosive and shifty once again in the Louisville Spring Game on Friday night. He played for the Red team in the first half and the White team in the second half.
But it didn't matter because he ran hard for both sides, gaining 150 total yards.
Dyer ran 10 times for 99 yards and two touchdowns and also had a 25-yard reception for the Red team in the first half. He ran four times for 51 yards for the White team.
"He looked really quick and he was seeing things and making cuts," Petrino said. "The first time that we have really seen him in spring at 100 percent and I was happy with the way he was seeing it and the confidence he had to break tackles. It was nice to see."
U of L running backs coach Kolby Smith said Dyer has made "huge strides" since the start of spring ball when was just getting back into it after sitting out since October.
"We still have a long way to go," Smith said recently. "But we're getting there."