BOSTON — Top starter Shane McClanahan has paused his official progression through a throwing program after not feeling 100% in his first full-distance bullpen session, and he will seek further medical opinions on the nerve issue in his triceps.

“He’s kind of in shutdown mode,” manager Kevin Cash said before Wednesday’s game against the Red Sox.

McClanahan has been sidelined since late in spring training with the nerve problem, a somewhat uncommon issue. He started throwing a few weeks ago and at that point, baseball operations president Erik Neander said if all went well he could rejoin the rotation as soon as late July.

McClanahan threw off a mound at a shortened distance on June 3, then had a 12- to 15-pitch session at the normal distance on Saturday.

McClanahan last pitched in the majors on Aug. 2, 2023, having undergone Tommy John elbow surgery later that month. He had a healthy spring until leaving the March 22 game with what was diagnosed as a nerve issue.

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