The slender Jackson, listed on LSU's official site at 5-11 and 168 pounds, is now up over 180 pounds, per Moffitt, who joined TSD publisher Ben Love Thursday on "Bumper to Bumper Sports" on 103.7 FM (KLWB) in Lafayette.
"Donte is an amazing young man. He's gained 13 pounds in two weeks," Moffitt said, laughing. "He was slight when he got here, and he's really fast. He's such a great young man. He's humble, he's a hard worker and he's always got a smile on his face. You can tell he's happy to be a Tiger. He's doing phenomenal."
Moffitt is the only LSU coach allowed to work the players out during this time of year. The 2015 signing class, with three exceptions, arrived two weeks ago for classes and afternoon workout sessions.
Jackson was primarily recruited as a cornerback from Riverdale High School, but several LSU coaches - from head coach Les Miles to recruiting coordinator Frank Wilson - have not so subtly hinted that Jackson will also have a shot to feature out of the backfield and in the return game in year one.
Doing all that at 168 pounds in the SEC might have proved a tall order.
For now the blazing track star won't have to worry about that. The only question is how much of that weight he'll retain throughout the fall.