Darius Acuff Jr. is dominating March. His NBA fit is more complicated.

Darius Acuff Jr. has exploded into March Madness stardom, but his defense and one-way profile raise familiar questions for NBA teams.

Darius Acuff Jr. is no stranger to making history. This season, the 19-year-old Arkansas point guard became the first player to lead the SEC in both points and assists since Pete Maravich in 1970, and third to win both freshman and player of the year. 

Indeed, pretty much everything about Acuff screams superstar. He's more than an electric basketball player. There's an icy cool charisma to him -- the kind Reebok believes is ready to be the face of a franchise, as the company announced on Tuesday that it has signed Acuff to a signature shoe deal (meaning he will have his own shoe when he takes the court for his first NBA game), marking the first time that has ever happened for a male athlete that is still in college. 

Anyone who gets the "HIM" endorsement from Allen Iverson is true-hooper stamped, but a necessary caveat is that it is Iverson's jojb to sell the world on Acuff's impending stardom. He's Reebok's vice president of basketball. For now, this is just marketing. There are no guarantees. What kind of actual NBA player Acuff turns out to be, both in the short and long term, remains to be seen. 

And that's where this gets interesting. Or, if you're the team that ends up drafting Acuff with a top-five pick, potentially dangerous. Acuff represents what has become the league's most precarious positional archetype: The small, score-first point guard who can't defend. 

Now, before we go any further, a couple disclaimers. First, Acuff isn't that small. He's listed anywhere from 6-foot-2 to 6-foot-3, and at 190 pounds he's built like an old-school SEC running back -- his sturdy frame and straight-line strength is actually one of his most devastating attributes, at least against college players. Yes, he'll be undersized in a lot of NBA point guard matchups, but so is Jalen Brunson, who one league scout told CBS Sports is one of Acuff's better NBA comps.