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Koji Uehara flies back to Boston for further exams on right wrist

DETROIT -- Boston Red Sox closer Koji Uehara flew back to Boston on Sunday to be examined by the Red Sox medical staff after undergoing a CT scan in Detroit on his sore right wrist.

Manager John Farrell said he did not have the results of the CT scan, but there remains sufficient concern to send Uehara back to be checked by the Sox staff.

Uehara was struck in the wrist by a line drive off the bat of Detroit's Ian Kinsler, the last batter of the night in Boston's 7-2 win over the Tigers on Friday. Uehara retrieved the ball and threw out Kinsler to end the game but was in obvious pain. X-rays taken after the game did not show a fracture, and Farrell declared Uehara to be day-to-day.

But with the soreness persisting, the decision was made to administer a CT scan Sunday.

"The fact that there are persistent symptoms even after the reduction in swelling, we've got to check him thoroughly," Farrell said.

With Justin Masterson designated for assignment, Farrell said the club will need to add bullpen help before Tuesday in Miami. Ryan Cook, acquired from Oakland in exchange for a player to be named later at the trading deadline and sent to Pawtucket Aug. 3, will be eligible to return by Thursday. He can come back sooner if the Sox need to place a pitcher on the DL.