Aiyuk’s football-obsessed offseason already paying off at camp

SANTA CLARA — The Brandon Aiyuk Show was on the 49ers' practice field Sunday, a direct result of the receiver's offseason preparation. The fourth-year wideout has taken his game to the next level, which includes a focus on his physical conditioning. "I feel good," Aiyuk said on Sunday. "We will see tomorrow when we put the pads on. It's a little different when your mind if going a million miles an hour. It seems like your body - it's just less work that you have to go through. It feels like every play is not just a thousand miles per hour and full exertion on the body. Just to be able to get to certain spots and just play football." San Francisco coach Kyle Shanahan has been impressed with how Aiyuk entered training camp, describing the receiver as football obsessed. "Just the way he was all offseason," Shanahan said on Sunday. "I mean just randomly calling, talking about football, how much he's working out, how prepared he was when we started in phase one and two. You can just tell he is excited. The questions he asked, he's just, he's really into it." Aiyuk starred during the 49ers' red zone work Sunday. He caught four touchdown passes - three from Sam Darnold and one from...