Jameis Winston sprained his right foot during the Saints' practice on August 8th, causing him to miss the team's first two preseason games. Returning to practice is a significant step towards a full return.
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The article mentions that he had both of his feet "heavily taped" but could still move around normally. Winston isn't known for his wheels, so as long as his lower body is structurally sound, it shouldn't affect his game too much. If he is forced to miss time, we would presumably see veteran Andy Dalton man the quarterback position, but Winston will offer a higher upside for the Saints pass-catchers.