His jersey was garnet colored from the Florida State game in 2008 where it was raining and the FSU endzone was painted garnet (FSU colors are garnet and gold), therefore every time he was tackled in the endzone he got FSU garnet covering his jersey.
The real question should be what was wrong with Tim Tebow that made him such a baby after his loss to Alabama!
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Tebow doesn't bleed. Other people's blood gets on his jersey when he stiff arms them.
It was paint. The field was wet and it was raining. They were playing their rivals, Florida State, who's colors are red and yellow.
If you are speaking of the photo shown constantly taken during the 2008-2009 season FSU game he is not bloody, it was raining and the "blood" is the ink from the FSU drawing on the field.