Judging by the small image, I would say that the player with the name on his jersey is slightly "out of focus" than the kid in yellow, which appears to be the main subject as well as what is "in focus". It seems that the distance between the two is approximately 10-12 feet. This slight "out of focus" on text can sometimes appear to give a ghosting effect rather than an "out of focus" effect.....
But then again, the image as a whole doesn't seem to appear very sharp. We would really need to see a much larger version. However, even shooting at 1/1600 sec., camera shake can still happen due to the lens length and your true ability to steadily hold a camera. Also, a lot of "kit lenses" as well as some earlier made off-brand lenses tend not to be very sharp due to the simple and inferior made glass and this too could be the culprit.....
How much cropping into the picture could be another, heavy cropping or cropping into an image very closely to give it a close-up appearance can also cause this phenomena.....