Adam LaRoche, a fixture at first base for the Washington Nationals the past four seasons, agreed to terms Friday with the Chicago White Sox, according to a person familiar with the situation. According to reports, the contract is for two years and worth $25 million. The deal has yet to be announced and is pending a physical Monday. LaRoche's departure via free agency became a certainty when the Nationals declined a $15 million option on him last month. Washington is expected to use Ryan Zimmerman at first base and keep Anthony Rendon at third. LaRoche, 35, a key piece of two National League East title runs, enjoyed one of the finest seasons of his career in 2014, hitting .259 with a team-leading 26 home runs and 92 RBIs while playing solid first base and serving as one of the Nationals' clubhouse leaders. LaRoche won his only Gold Glove and Silver Slugger awards during a strong 2012 season, when he hit a career-high 33 home runs with 100 RBIs. LaRoche could not be reached for comment. LaRoche reportedly had interest from the Miami Marlins and San Diego Padres. By signing in Chicago, LaRoche is closer to his hometown of Fort Scott, Kan. He will also form a formidable middle-of-the-order power duo with American League Rookie of the Year and designated hitter-first baseman Jose Abreu.