"Last year, he was a victim of the wind blowing in every single day at home," Sveum said. "This year, you can't say that. He's swung the bat really well off lefties. Hopefully last night, hitting off that tough righty [the Padres' Brad Brach], that double, that was his best swing off a righty all year. Hopefully that can catapult him."
Soriano last homered on April 18; in 2012, he didn't connect until May 15. In April 2011, he set a club record with 10 homers in April. Sveum expects Soriano, 37, to deliver.
"That media guide doesn't lie when you have 600 plate appearances at the end of the year," Sveum said.
• Ian Stewart, on a Minor League rehab assignment with Triple-A Iowa, went 4-for-40 in 12 games.
"He's got to start swinging the bat better, have more consistent at-bats," Sveum said of the third baseman. "We'll wait and see."
Major League players are limited to 20 days per rehab assignment. Stewart's time expires on Friday.
"Right this second, I don't think I'm ready," Stewart told the Des Moines Register on Tuesday. "That's just me being honest and knowing myself as a player."
Carrie Muskat is a reporter for MLB.com. She writes a blog, Muskat Ramblings, and you can follow her on Twitter @CarrieMuskat. This story was not subject to the approval of Major League Baseball or its clubs.