SCOTTSDALE — The scrimmage against Team USA at Scottsdale Stadium three years ago proved to be a memorable day for seven young Giants. Because they didn’t want to put much mileage on highly paid veterans as they prepared for that spring’s World Baseball Classic, Team USA’s coaches borrowed seven Giants prospects for the day, and five of them got into the exhibition game against San Francisco. The prospects got to keep their hats as a memento and six of them sat for a photo in the red, white and blue. The seventh turned out to be the best of the bunch, and a year later, it looked like he might be a pretty obvious choice for Team USA in the 2026 World Baseball Classic. Ryan Walker missed that photo because he was playing catch, but he enjoyed the day and gave the hat to his father. He then went out and so thoroughly dominated Triple-A hitters that the Giants called him up in May, and the next year, he was so good that he finished the year as the closer.Had Team USA been putting together a bullpen for a 2025 WBC, the Washington native would have been an easy pick. Instead, Walker will spend all spring at Giants camp, but he still has big plans...