There’s no rivalry between Starlin Castro and Javier Baez. The Cubs don’t have to choose between their $60 million shortstop and Baseball America’s No. 5 overall prospect. Castro remembers how Alfonso Soriano looked after him as a rookie in 2010. Baez understands his place in the clubhouse and knows enough to listen. “I talk to him a lot,” Castro said Tuesday at Cubs Park. “Some people don’t have a good relationship because they’re in the same position. But me and him? Nah, (we’re good). That’s what I tell him: ‘Play hard, you’ll be up there no matter what. I don’t know where. But you’ll be there, because you got great talent and you play ball the right way.’” Castro is still getting treatment for the hamstring strain that will likely keep him sidelined for at least another week. He guessed he might need only eight or 10 games to feel prepared for Opening Day. He said he already felt ready after an extensive offseason conditioning program reshaped his body. They both have big arms, some swagger and a few defensive issues to fix. But Castro looks forward to playing with Baez, maybe as soon as this summer. “For us, the idea of Baez is in the future,” manager Rick Renteria said. “Right now, I’m glad Starlin feels that way, and I’m sure the feeling is mutual. They both respect each other immensely. And somewhere down the road when that happens, I’m sure it will be nice to see.” The blueprint would be 2012 Anthony Rizzo, who made adjustments at Triple-A Iowa and crushed Pacific Coast League pitching before getting called up on June 26, dealing with the financial reality and taking the service-time considerations into account.