Klay Kubiak will call the offensive plays for the 49ers on Saturday

49ers head coach Kyle Shanahan handles the offensive play-calling duties, but he will turn it over to offensive coordinator Klay Kubiak on Saturday.Shanahan said Wednesday that Kubiak will call the plays against the Broncos and perhaps through the entire preseason."I haven't decided for the whole time, but I know he'll do it this week, and he'll most likely do it through the whole preseason," Shanahan told KNBR, via 49erswebzone.com. "But I've got so much confidence in Klay, just how good of a job he's done for us, how long him and I have been working together here, that it doesn't bother me in the season. There's times that Klay will call plays; there's times that I will, and I do think that it's a little bit overrated on who's doing it."For the most part, not much is going to change. That's something that I really enjoy doing, something that I've always worked at and have a lot of experience of, but we work on the game plans all week together. . . . Usually, when you get to game day, you have an idea of everything that you're going to call in each situation, and it can be a little...