SAN FRANCISCO — When Buster Posey took over as president of baseball operations for the Giants, he was only three years removed from his days in the batter’s box and behind the plate. But when the front office met in a conference room for three days at the Winter Meetings last month, it was another member of the group that had the most recent experience with the free agents the Giants were talking about. Curt Casali played 41 games for the Giants in 2024 and was in camp with the Atlanta Braves last spring before moving on to life in a front office. Casali was hired by the Giants early in the offseason, joining Javier Lopez as former Posey teammates who are now advisors to the front office. The hope for both sides is that he can add value behind the scenes at a time when the catching position is undergoing a massive change. Casali is a fan of ABS, which will be implemented this year, and after 11 years in the big leagues, he’s very familiar with not just the Giants, but their opponents and players they’re chasing. “It’s definitely a cool perspective, I think, and something that maybe not everybody in our room can attest to,”...