The Giants have not seen much from top prospect Bryce Eldridge this season in his second MLB stint.Mostly due to his lack of consistent playing time after being promoted to the majors on May 4. Eldridge spoke candidly to USA TODAY Sports on Tuesday, and admitted that he’s “surprised” by the lack of opportunities, but is happy to be in the majors and understands he has to earn more reps moving forward. Giants president of baseball operations Buster Posey joined KNBR 680’s “Murph & Markus” on Thursday morning, and discussed Eldridge’s playing time and why he is not receiving more consistent at-bats. “Look, you’re trying to get the 21-year-old in the best spots you can,” Posey said. … “Hopefully everybody sees it too, it’s a positive that Casey Schmitt is playing as well as he is … I think who Bryce was going to originally have some time playing for were some of our veterans, who started to tick up as well, so you’re trying to put the 21-year-old in the best spot that you can and we’ll just have to evaluate as each game goes on.”Posey, when asked whether it was more beneficial...