The Mariners will call up third baseman Alex Liddi from Triple-A Tacoma on Tuesday. Liddi will be the first player from the MLB European Academy to make the major leagues. The 23-year-old Italian native batted .258/.332/.478 with 28 home runs and 101 RBI over 632 plate appearances at the Triple-A level this season. The power is encouraging, but he could struggle to hit for a high batting average in the big leagues. The Mariners also plan to promote outfielder Michael Saunders and right-hander Steve Delabar.