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3/14/2013 7:00 P.M. ET

Dodgers can't recover vs. Cubs after rough first inning

Capuano settles in with four strikeouts in 4 1/3 frames after three-run first

GLENDALE, Ariz. -- Welington Castillo tripled home a pair of runs in a three-run first inning, and Chris Rusin pitched five scoreless innings as the Cubs four-hit the Dodgers Thursday, 8-1.

Rusin, in the mix to make the Cubs pitching staff, outpitched veteran Dodgers starter Chris Capuano. Rusin allowed only one hit with a walk and a strikeout. Capuano, trying to fight his way back into the Dodgers crowded rotation, struggled in the early innings before retiring the final five batters he faced. He was charged with five earned runs on six hits in 4 1/3 innings.

The Cubs jumped ahead with a three-run first inning that featured a two-run triple to the warning track in center by Castillo, who homered off Capuano when they met on Feb. 25.

In his third-inning at-bat Thursday, Castillo was hit on the elbow by a Capuano pitch. One out before Castillo was hit, Brent Lillibridge singled. One out after Castillo was hit, Luis Valbuena singled home Lillibridge. Darnell McDonald added an RBI single to extend the lead to 5-0.

The Cubs picked up a sixth run on a wild pickoff throw by Dodgers reliever Ronald Belisario, making his first appearance since returning from the World Baseball Classic with Team Venezuela.

Chicago added their final two runs on a double by Brian Bogusevic two batters after a dropped fly ball in the outfield.

Lillibridge and McDonald each had a pair of hits for the Cubs.

Dodgers up next: The Dodgers play split-squad games Friday, with Aaron Harang starting against Anthony Bass and the Padres in a day game at Peoria, Ariz., and Stephen Fife starting against Yordano Ventura and the Royals in a night game at Glendale, Ariz. All of the club's regulars that are in camp are expected to play, and Nick Punto is due to rejoin the club from his stint with Team Italy in the World Baseball Classic.

Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.