If you're thinking about buying a Derrick Henry jersey anytime in the near future, you're probably going to want to hold off on that purchase. Apparently, no one in Tennessee seems to know what number the rookie running back is going to wear this year.

For the past few months, Henry has been wearing No. 2 during practice. The Heisman Trophy winner also wore that number when he ran for 74 yards and a touchdown during Tennessee's preseason opener against the Chargers on Saturday.

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Derrick Henry (2) will not be wearing this number during the regular season. USATSI

Unfortunately for Henry though, there's one big problem with his current number: The NFL's not going to let him wear it.

League rules stipulate that a running back has to wear a number between 20 and 49. The only way Henry would be allowed to wear No. 2 is if he switched his position to quarterback, kicker or punter, and we can probably all agree that that's not going to happen.

Basically, if you buy a Henry jersey with the No. 2 on it, you're wasting your money.

So what number should you buy?

Well, that's where things get more confusing.

At the NFL rookie premiere in May, Henry showed up wearing 24.


Unfortunately for Henry, there's also a problem with that number: It's already taken by someone on the Titans roster.

Perrish Cox is currently wearing No. 24 and it doesn't sound like he's ready to give it up just yet. According to Henry, Cox wants to wait until the 90-man roster gets trimmed down to 53 so they can see what's "available."

"We're just trying to wait and see what numbers come available," Henry told ESPN.com this week. "If a number comes available that he wants, then we'll try to work something out."

If Cox can't find a number that he likes, then Henry's in trouble because he doesn't have a Plan B.

"We're still not sure yet, we just have to wait. I'm anxious too to find out what number I will wear," Henry said.

The former Alabama running back, who wore No. 2 during college, is hoping that the number drama ends with him getting No. 24.

"I just think 24 is a good running back number," Henry said. "Perrish is a good dude. We'll have to see."

Perrish might be a good dude, but he's also a shrewd businessman. Five months ago, Cox was wearing No. 29, but he sold that number to DeMarco Murray after Murray was traded to the Titans.

Cox wouldn't say how much money he made off the transaction.

"I won't get into the details. We talked about it, and it was about a five-minute conversation,'' Cox said of his deal with Murray in March. "I'm glad we worked it out. It's always been his number, and he is going to be a good teammate. As long as he can make that No. 29 look good, it's all good with me."

After selling No. 29 to Murray, Cox picked his new number (No. 24), and now it looks like he might make some bank off that one.

As for Henry, not even the Titans seem to know how things are going to play out with their rookie. The team's official online store is selling a Henry jersey, but it has a big fat zero on it.

If Henry's hoping that the NFL will change its number rule, that's probably not going to happen. Reggie Bush petitioned to have the rule changed in 2006 so that he could wear No. 5, but his request ended up getting shot down.