When the San Diego Padres' front office started to put a plan in place for building a roster over the offseason, they likely didn't have adding a former All-Star for the league minimum in mind. However, the team was able to pick up outfielder Nick Castellanos on a minimum deal following his release from the Philadelphia Phillies. Despite his controversial exit from the Phillies, for multiple reasons, the signing of Castellanos by the Padres was generally praised. After all, the veteran has been a two-time All-Star in his career, and he is a former Silver Slugger. But through the first part of the MLB season, Castellanos has struggled to find his footing with the team , mainly being used as a platoon player . Castellanos has only appeared in 17 games for the Padres, which has been a new experience for the veteran. “When my switch is off, it’s all the way off,” Castellanos said to the San Diego Union-Tribune. “For me, the season would start, and the switch would go on, and then it’s on for six months.…