Hudson earned a win against the only team he had never beaten in a 17-year big league career, pitching the Giants past the struggling A's 4-3 on Sunday for a sweep in the Bay Bridge Series. Matt Duffy hit a two-run homer in the first and drove in three runs, and Brandon Belt added an RBI single in the initial inning to back Hudson, who became the 15th pitcher to defeat all 30 current teams in the majors. Buster Posey had a season-high four hits as the reigning World Series champion Giants swept the A's for the first time since May 20-22, 2011, at AT&T Park. The right-hander was a sixth-round draft pick by Oakland in 1997 and pitched his initial six major league seasons for the A's from 1999-2004. [...] base umpire and crew chief Joe West checked the ball Hudson was throwing in the third — the first time the pitcher has ever had that happen — drawing boos from the sellout crowd of 42,034. Oakland leadoff hitter and center fielder Billy Burns returned to the starting lineup after being held out of the lineup Saturday after fouling a ball that hit him in the groin area a day earlier, causing a testicular bruise. Switch-pitcher Pat Venditte (strained right shoulder) will pitch again Tuesday for Class-A Stockton using both arms after throwing a scoreless inning Saturday pitching left-handed.