For the first time, all invited players at this week's NFL scouting combine will be given a baseline brain activity exam. Roughly 320 players will undergo the test, called the ImPACT test, and will likely face more grilling than previous classes did about their concussion histories. Those implementing the changes call it smart football. "We're testing everybody, not just at-risk athletes who have had more than one concussion," said Dr. Art Rettig, an orthopedic surgeon at Methodist Sports Medicine in Indianapolis, which runs the medical part of the combine. "Everybody will have this ImPACT test so they will have a baseline, and whatever team they end up with will be sent that baseline information."