SAN DIEGO -- With Chase Headley nursing a mild strain of his right biceps, and with the Padres short on options at third base, first baseman Yonder Alonso crossed the diamond during batting practice prior to the game Wednesday against the Rockies.
Alonso took ground balls three hours before the game under the watchful eye of manager Bud Black and others.
Consider it insurance in case the team gets in a bind and needs someone to man the hot corner in a pinch.
"We've got a third baseman who is day to day with a biceps strain, and if something happens tonight, we might need someone to go over there," Black said. "[Alonso] has got good hands and a good arm. We're going to look at it a little."
Alonso has appeared in two games at third base during his Major League career -- with the Reds in 2011 and once with the Padres last season.
Alonso isn't a complete stranger to the position. He played it a lot as a youth and moved over to first base at the University of Miami because Ryan Braun played third base.