Chiefs rookies looking to make impact at camp

ST. JOSEPH, Mo. (AP) — The Kansas City Chiefs know exactly what they have returning from last season. They know what Patrick Mahomes, the two-time league MVP, can do under center. They are quite familiar with how much tight end Travis Kelce means to the offense. And they know that their defense, which allowed the second-fewest points in the NFL last season, returns mostly intact after shutting down San Francisco in their latest Super Bowl triumph. So as veterans reported to training camp Friday at Missouri Western State University, the reality for Kansas City might be this: Its chances of a record third straight Lombardi Trophy could hinge on players that are new this season.