What’s wrong with Koji Uehara?

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Red Sox closer Koji Uehara has been human of late, blowing back-to-back saves and allowing a total of seven runs in his previous four appearances, which has people wondering if the 39-year-old right-hander is wearing down.

However, after last night’s blown save Uehara told Rob Bradford of WEEI.com that “it’s nothing about fatigue” and then replied “still, I don’t think that’s the case” when told he’s approaching 150 total innings since the beginning of last season.

Red Sox manager John Farrell took a similar stance, saying the team is “being very conscious of the frequency of the use” but has no plans to shut him down.

Even with his recent struggles Uehara has a 2.25 ERA and spectacular 73/8 K/BB ratio in 60 innings overall this season, which are incredible numbers even if they pale in comparison to his ridiculous 2013 season totals.