Uehara plans to announce his retirement from professional baseball Monday, Jim Allen of Kyodo News reports.

Uehara signed with the Yomiuri Giants in Japan on Friday, Rich Dubroff of PressBoxonline.com reports.

Uehara stated that he will retire if he doesn't receive a major-league offer before the season begins, Kyodo News reports.

Uehara (knee/back) will not be available Saturday against the Cardinals, Carrie Muskat of MLB.com reports.