Fielder and outfielder Shin-Soo Choo were put on the 15-day disabled list Wednesday by the AL West leaders.
Choo received an injection to help relieve lower-back discomfort.
General manager Jon Daniels said Fielder this week reported having similar symptoms to what he had before the surgery in 2014 that forced him to sit out most of his first season with the Rangers. Fielder was feeling weakness and discomfort in his neck and left arm.
Dr. Robert Watkins, who examined both players in Los Angeles, recommended surgery for Fielder.
Daniels said Fielder will return to Texas and get a further evaluation Friday from Dr. Drew Dossett, a specialist who performed Fielder's previous neck surgery.