Duke signed a multi-year deal with the White Sox on Tuesday, CSN Chicago reports. The 31-year-old former-starter spent last season with the Brewers, going 5-1 with a 2.45 ERA in 58.2 total innings. He'll join a White Sox bullpen that struggled in 2014, posting the third-worst ERA in baseball. The bullpen also stranded only 68 percent of the runners it inherited, while Duke, himself, stranded 80 percent, well above the league average of 72 percent. Duke was at his best against lefties last season, holding them to a .198 batting average.