SAN FRANCISCO — When Randy Winn got called up to the big leagues by Tampa Bay in 1998, his Triple-A team’s trainer drove him more than two hours to the airport. Staffs were small back then, with every coach and trainer in the minors taking on added responsibilities, but these days, a lot of affiliates are starting to mirror life in the big leagues. Winn has seen those changes over the past year after taking over as vice president of player development for the Giants. Their minor-league facility in Scottsdale is better than their big-league one, and at their affiliates, everything continues to get bigger and better. But one thing hasn’t changed. The goal still is the same, finding the best way to get the best talent to the big leagues. While the Giants are not generally known for having one of the game’s best farm systems, it is a group that is on the rise, particularly on the position player side. Their top-six prospects are hitters, per MLB Pipeline, and that number will go up when Venezuelan shortstop Luis Hernandez officially joins prospect lists. It’s been more than a decade since the Giants were consistently developing...