Koji Uehara suffers strained right hamstring

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Red Sox closer Koji Uehara has not looked sharp this spring in the Grapefruit League, yielding seven hits and two earned runs in three innings. And now he’s going to have a little less time to iron things out.

As first reported by WEEI’s Rob Bradford, Uehara suffered a strained right hamstring while doing some conditioning Tuesday in Red Sox camp. It’s considered a mild strain and Uehara should be fully recovered by the beginning of the regular season, but he probably won’t be able to make another Grapefruit League appearance until late next week.

Uehara surrendered 10 earned runs over his final 7 2/3 innings last season and he turns 40 years old on April 3. If it all comes crashing down this season for the veteran right-hander, Edward Mujica or Junichi Tazawa could move into Boston’s ninth-inning role. But let’s not freak out just yet.