Pain from the nerve forced Braun to alter the mechanics of his swing and sapped his power in 2014, when he played 135 games and posted career lows across the board, with a .266 batting average, .324 on-base percentage, .453 slugging percentage and .777 OPS.
Since there is no apparent Plan B, Braun and the Brewers have a lot riding on the results of this month's procedure. Braun will earn $12 million in 2015 before a five-year, $105 million extension kicks in beginning with the 2016 season.
Adam McCalvy is a reporter for MLB.com. Read his blog, Brew Beat, and follow him on Twitter at @AdamMcCalvy. This story was not subject to the approval of Major League Baseball or its clubs.