Jansen reported to spring training Wednesday but won't immediately start a throwing program due to general lat soreness, Alex Speier of The Boston Globe reports.
Analysis: Everything initially appeared to be in order after the veteran closer's individual workout Wednesday morning, but Boston GM Craig Breslow then announced the lat injury. It's believed to be a mild issue, but coming into spring training with a new injury is always a concerning development. Jansen said he hopes to being throwing in about a week, per Gabrielle Starr of the Boston Herald.
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