Rookie quarterback Pat Mahomes II had his best day at Chiefs practice on Wednesday. Mahomes made a number of good throws, including one deep down the right sideline that rookie wide receiver Marcus Kemp went high to grab. Last week, quarterbacks coach Matt Nagy said he thought Mahomes' talent would begin to show more as he grew more comfortable with the offensive system and perhaps that's what's happening. "It definitely was a good day," Mahomes said. "It's all about putting these good days back to back and not having bad days." The Chiefs, who conclude their offseason work Thursday with the end of their three-day mini-camp, practiced without safety Eric Berry, who has a sore heel.