Extra bases

• With Scott Feldman gone via trade to Baltimore, Cubs manager Dale Sveum said Carlos Villanueva will be stretched out to move back in the rotation.

Feldman was scheduled to start on Tuesday, but lefty Chris Rusin was called up from Triple-A Iowa to take his spot. Villanueva began the season in the rotation and made eight starts before he was moved to the bullpen to make room for Matt Garza. Villanueva was 1-3 with a 3.93 ERA in eight starts, and has a 2.40 ERA in 15 relief appearances.

Villanueva will need time to get stretched out, and most likely won't be ready to start until mid-July, Sveum said.

Feldman will make his first start for the Orioles on Wednesday against the White Sox.

• Starlin Castro batted .167 in June, the worst month of his young career. The shortstop has gotten into some bad habits, Sveum said.

"He's just got to slow things down and get in a better position to hit like he did when he first got here," Sveum said.

• Rusin was named to the Pacific Coast League All-Star team on Tuesday. The game will be played July 17 in Reno. The lefty compiled a 7-7 record and 3.27 ERA in 17 games (16 starts), and leads the PCL in innings pitched.