Brendon McCullum is to have surgery on his back, forcing him out of the remainder of Middlesex's T20 Blast campaign.
The former New Zealand captain was troubled by the injury during a short spell with Middlesex earlier this season, and the problem has worsened while he was playing in the
Cricket: McCullum to undergo back surgery
Brendan McCullum of Middlesex hits a boundary during the Natwest T20 Blast. Photo / Getty Images
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