The first rule of preseason, of course, is to stay healthy.
(It's OK to talk about it. Just don't get hurt.)
The NFL's two most-hyped rookies got the message a little late. Neither injury is season-ending, but they are reminders that months of analysis and debate can come to a halt in a single preseason moment.
Let's take a closer look at the most significant injuries in Week 1 of the NFL preseason. (Fantasy alert: If you don't see the player you're looking for on this list, chances are that his injury is minor.