CHICAGO -- Cubs outfielder Justin Ruggiano, sidelined with a strained left hamstring, was expected to begin a Minor League rehab assignment on Monday with Triple-A Iowa.
Ruggiano's last game was April 23 when he hit his first home run of the season, but he had to come out of the game after feeling his hamstring "pop" while chasing a fly ball near the visitors' dugout at Wrigley Field. He was batting .229 in 14 games.
Ryan Sweeney, who was placed on the disabled list May 3 with a strained right hamstring, took a "step back" in his rehab, Cubs manager Rick Renteria said. Sweeney was injured chasing a fly ball against the Cardinals on May 2.
Both Sweeney and Ruggiano have been rehabbing at the Cubs' complex in Mesa, Ariz. Renteria did not believe Sweeney had re-aggravated his leg seriously.
"He just probably felt it a little lightly," Renteria said. "He's been doing great."
There is no timetable for the outfielders' return.
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.