For the third straight year, the Orioles have signed veteran lefty slugger Pedro Alvarez as a spring training addition. The Orioles have agreed to terms on a minor league deal with Alvarez that will include an invitation to big league camp, according to an industry source. Given the fact that the Orioles will likely have an outfield platoon and Mark Trumbo as the regular designated hitter, there’s really no space for Alvarez on the Opening Day major league roster, but the addition provides left-handed power depth at designated hitter position or first base. It’s not clear when Alvarez will report to Sarasota, but the team was preparing his locker on Sunday morning. Alvarez, 31, signed a minor league deal with the Orioles last season on March 13. When the Orioles signed Alvarez last season, they did so experimenting with him in right field for the first time in his career.