No date has been announced for the procedure which likely will force him to miss the entire 2009 season.
Neshek, in his third year in the big leagues, appeared in 15 games for Minnesota in 2008 before suffering an elbow injury in May. He finished 0-1 with a 4.73 earned-run average and 15 strikeouts in 13 1/3 innings.
The 28-year-old re-injured his elbow in an offseason throwing session and underwent an MRI Tuesday that revealed a tear of the ulnar collateral ligament in his elbow.
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