Gordon Beckham was brought up from Class AAA Tacoma to fill Segura's spot on the active roster.
The Mariners will be without shortstop Jean Segura for the first game of the series vs. the Dodgers, if not more.
The team placed Segura on the paternity list on Friday afternoon with his wife going into labor.
To fill his spot on the roster, the Mariners selected the minor league contract of Gordon Beckham from Class AAA Tacoma. To make room for Beckham on the 40-man roster, outfielder John Andreoli was designated for assignment.
A player may stay on the paternity list for a total of three days, but can return at any time.