Jackson, 22, had joined the Mesa Solar Sox in late October after participating in the Pan-Am Qualifying Tournament in Puerto Rico. He was limited to three games for Team USA because of a minor ankle injury. He appeared in four games with the Solar Sox and had one double and five RBIs. His last game was on Friday, when he was pulled after two at-bats.
Oneri Fleita, the Cubs' player development director, said on Tuesday that Jackson had to be hospitalized in Mesa, Ariz., because of cellulitis with an abscess in his shin, which is similar to a staph infection. He was expected to be released on Wednesday.
Fleita said that Jackson will go home later this week but go back to Mesa in January to workout with other Cubs players in preparation for the 2011 season.
This year, Jackson batted .316 with six homers, 19 doubles and 38 RBIs in 37 games with Class A Daytona, and he hit .276 with 13 doubles, six triples, six homers and 28 RBIs in 61 games with Double-A Tennessee.
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.