SAN FRANCISCO — Bryce Eldridge leaned against the dugout rail on Tuesday afternoon and shook his head. He had talked to teammates, coaches and family members. He had slept on it. He had tried to move on, but he couldn’t. He was still annoyed.Eldridge had come up in the bottom of the ninth a night earlier with the tying run on third and the winning run on first. It was the type of moment he had been dreaming of his entire life, the type he feels he is built for. For the 21-year-old, there has never been another possibility. He wasn’t headed for an office job, and despite his height, basketball was not his given path. He believes he’s here to win baseball games, and on Monday the moment was there, just waiting for him to grab it. Eldridge dug into the dirt against Gus Varland and took a fastball right down the middle. And then he took another one. Down 0-2, he swung through an elevated fastball and angrily looked up at the scoreboard. Hours later, that sequence still bothered him. Eldridge had an idea in his head of how Varland might attack him, but he didn’t expect those two pitches at the knees, and they put him in an early...