DeSean Jackson might not be wearing No. 10 in Washington. (USATSI)
DeSean Jackson might not be wearing No. 10 in Washington. (USATSI)

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DeSean Jackson is officially a Washington Redskin. We know that because he signed his contract on Wednesday afternoon. 

Now the next question is: What number will Jackson wear in Washington? And that question isn't as easy to answer as it might seem.

Since his rookie year in 2008, Jackson has worn No. 10. There's a small problem with getting that number in Washington though: It's already taken. And it's taken by someone who Jackson probably won't be able to buy off. That someone would be Robert Griffin III.

Even though RG3 has worn No. 10 since high school, Jackson is still holding out hope that the Redskins quarterback will give the number up, "We talked about it a little bit, but there hasn't been a decision that's been made yet so far," Jackson said on Wednesday. "Maybe RG3 will wear No. 3 and I'll try to get 10. We'll see how it goes."

One option Jackson doesn't have is switching to his college number. The former Cal wide receiver wore No. 1 while playing for the Golden Bears, but under NFL rules, he's not allowed to wear that number. Wide receivers have 20 options when it comes to jersey numbers: they can either wear a number between 10 and 19 or a number between 80 and 89.  

Griffin could theoretically make the switch to No. 3 though because quarterbacks can wear any number between one and 19, but it doesn't sound like that's going to happen.