Assistant general manager Gord Ash said Narveson had a chronic hip condition that dates back several years, and doctors advised after the season that it required a surgical fix. The procedure was done arthroscopically by Dr. William Raasch, the Brewers' head physician. Narveson was to visit Raasch on Wednesday for a follow-up before returning home to North Carolina to continue therapy.
Ash said that Narveson's timetable would go "right up to Spring Training, but everybody is optimistic about the outcome."
Narveson was 11-8 with a 4.45 ERA during the regular season, and is expected to be part of a five-man Milwaukee starting rotation set to return intact in 2012. He made six apparently healthy relief appearances during the postseason, pitching four times in the National League Championship Series against the Cardinals. Narveson worked in relief of Shaun Marcum in Game 6 of that series, and allowed a pair of homers and five earned runs in a loss that dashed the Brewers' World Series hopes.
In other roster moves on Tuesday:
The Brewers outrighted infielder Josh Wilson and right-hander Mark DiFelice to Triple-A Nashville. Wilson spent most of the season with the Brewers, but was left off the roster for the NL Division Series and the NLCS.
The team reinstated right-hander Brandon Kintzler from the 15-day disabled list, and left-handed relievers Manny Parra and Mitch Stetter from the 60-day disabled list.
With those transactions, the Brewers' 40-man roster returned to capacity.
The club also re-signed shortstop Edwin Maysonet to a Minor League contract, with an invitation to Major League Spring Training camp. Maysonet, who turned 30 last week, batted .290 in 103 games at Nashville in 2011.