Rajon Rondo vs. Chris Johnson?
Celtics guard Rajon Rondo might be considered undersized when it comes to the NBA, but there's no question his estimations of his racing ability are larger than life.
For the second December in a row, Rondo has thrown down the gauntlet to the fastest man he can find.
After challenging Usain Bolt to a footrace last year, Rondo wants to take on Tennessee Titans running back Chris Johnson.
This, of course, comes courtesy of Johnson's Twitter account: "My bradda ...
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