During the 2008 season, Blalock injured a hamstring, placing him on the disabled list again for the second time in two seasons. On May 18, 2008, Blalock and the Rangers announced that upon his return to the team, he would return as a first baseman. Blalock had never played first base as a professional, but he felt it was the best move for the team, as the Rangers had not seen much offensive production from their first basemen in 2008. Blalock worked with Ron Washington and spoke with Phil Nevin (who made a similar switch from third to first with San Diego in 2002) to start learning the position. With the emergence of Chris Davis at first base, Blalock temporarily returned to third, but eventually switched positions with Davis to avoid more shoulder problems.