The Padres on Monday placed second baseman Jedd Gyorko on the paternity list and recalled first baseman-left fielder Tommy Medica from Triple-A El Paso.

Gyorko will miss Monday night’s game in San Francisco and will possibly miss the entire three-game series.

Gyorko’s wife, Karley, was due with twin boys - Brody and Kadin.

Under the current collective bargaining agreement, a player on the paternity list is allowed up to a three-day absence. A team can use another player from its 40-man roster to replace the player on leave.

Earlier this month, Gyorko, 25, signed a six-year, $35 million contract extension that will keep him with the Padres through at least 2019. While his salary for 2014 - $510,900 - remained unchanged, the deal includes a suite on the road for Gyorko and his family.

Gyorko played in all of the Padres’ first 26 games. He is hitting .144, lowest among the team’s regulars. Though historically a slow starter, he is slugging just .218, with a home run, a triple and a double.