A second neck surgery in two years will force the end of Prince Fielder's playing career, sources told MLB.com on Tuesday.
The Rangers will hold a news conference on Wednesday afternoon at 5 ET/4 CT at Globe Life Park to announce that the slugger's 12-year big league career is finished. The Rangers have not commented on or confirmed the news. The news conference will be streamed live on MLB.com and TexasRangers.com.
Fielder, 32, had surgery for a C4/C5 herniation in his neck on July 29, ending his season. He also underwent a similar procedure in 2014. He is not retiring; he is medically disabled and doctors will not clear him to play, sources told MLB Network Insider Ken Rosenthal.

The six-time All-Star is a career .283/.382/.506 hitter with 319 home runs and 1,028 RBIs with the Brewers, Tigers and Rangers. His father, Cecil Fielder, who played from 1985-88 and 1990-98, also hit 319 big league homers.
He is owed $20 million annually through 2020. It is not known if Texas has insurance on Fielder's contract, according to Rosenthal's reporting.