"It's a good feeling," Sweeney told the Des Moines Register. "I put in some hard work down here, and hopefully I'll go up there and transfer it over."
Sweeney, 28, has played for the White Sox, Athletics and Red Sox, and he has a career .280 batting average over seven seasons in the big leagues. Last season he appeared in 63 games for the Red Sox, batting .260 with 16 RBIs. Boston released him on March 30, and he signed with the Cubs on April 2.
A left-handed hitter, he was batting .337 in 23 games with six home runs, two doubles, two triples and 16 RBIs.
Sappelt was used in manager Dale Sveum's platoon against left-handed pitchers. In 20 games with the Cubs, he was batting .178.
The Cubs also may be tweaking the bullpen, and could send right-hander Kameron Loe to Iowa. Loe gave up one run on one hit and two walks in one inning against the Reds on Sunday and has a 5.40 ERA in seven games.
The team could decide that Kyuji Fujikawa is ready to return after one rehab outing. The Japanese right-hander, on the disabled list since April 13 with a strained right forearm, threw 21 pitches in one inning for Iowa on Sunday and struck out two.
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.