"Make sure you have your glove, it's going to get interesting," Alonso said before the Padres played the first of two games in a building that had never hosted a professional baseball game. "The dimensions are a little interesting. Personally, I think it's pretty cool."
Alonso was asked if he had encountered a field with that short of dimensions at any point during his youth or amateur career.
"I haven't gotten too lucky with that," he said. "For some reason, I've always played on really big fields. Maybe that has something to do with my age. I was always playing in a two-, three-year older league. The fields always feel so big."
But not this weekend, as manager Bud Black noted.
"It's a little close to home plate," Black said of the fence in right field. "I'm watching batting practice and it looks like the ball flies.
"I talked to a couple of San Antonians, and they say that kickers and punters like to kick the ball here and that it really travels. I've noticed the ball does carry."
The Alamodome is home to the Valero Alamo Bowl each December and the University of Texas-San Antonio football team in the fall. The San Antonio Talons, an Arena League football team, also plays here.
Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.