"The guy is a great person and a great competitor," Saban said. "He's got tremendous versatility as a running back. He was the best fit for us and the best pick for us."
Brown was one of three top-rated running back prospects in this year's draft along with Auburn teammate Carnell Williams and Texas' Cedric Benson.
Brown might have jumped to the top of the charts with a tremendous showing at the scouting combine when he ran times of 4.43 in the 40-yard dash, a tremendous showing for someone 6 feet, 230 pounds.
But Saban kept coming back to Brown's versatility as a big reason why he liked Brown so much.
"He's got the best speed, the best hands and the most power of anybody we could pick at this position," Saban said. "He's got a rare combination of quickness and a real burst of speed in the secondary and power that we rarely see inn a a running back.
"We always felt like this guy was our guy and was the best fit for our team."