The Seattle Mariners have signed pitcher Erik Swanson to a one-year deal, meaning that he’ll make a total of four starts for the team. He was originally slated for long relief work, but the Mariners have discussed putting him in the rotation. The right-hander, who grew up in Mariemont, North Dakota, pitched one game for AAA Tacoma last year, struck out eight batters and allowed just six hits and no runs.