Chicago Cubs centerfielder Felix Pie will undergo surgery on Monday to correct a personal problem and miss 3-5 days, manager Lou Piniella announced before the Cubs-Brewers game.

According to the Chicago Tribune, Pie is suffering from what's called testicular torsion, or, in layman's terms, a twisted testicle. It happened early in camp, but Pie had the problem reduced manually, sources said, and was able to continue playing. He was scheduled to have the corrective surgery on the Cubs off-day next Monday, but when Pie reported to camp with soreness Monday, the Cubs decided to get the procedure done today.

The surgery involves sewing the outer layer of the testicle to the scrotum wall. The Cubs said it was a minor procedure, and if the problem was not corrected soon, Pie would risk losing the testicle. It's not known how Pie incurred the injury, but it's not uncommon. Some men are more susceptible to it than others, but it usually happens in late adolescence
Source: Chicago Tribune