Four years after trading Carlos Quentin from Arizona to the Chicago White Sox, new Padres general manager Josh Byrnes is bringing the All-Star outfielder back to his hometown San Diego.

Byrnes made his second bold move in two weeks when he acquired Quentin from the White Sox for two prospects Saturday.

The trade is expected to bolster San Diego’s anemic offense. Quentin has four consecutive 20-homer seasons, including 36 in 2008.

“Improving our offense is a priority this offseason and the acquisition of Carlos gives us a proven middle-of-the-order bat,” Byrnes said in a statement. “We specifically targeted Carlos because of his production and his hard-nosed style of play.”

The White Sox received minor league pitchers Simon Castro, a right-hander, and Pedro Hernandez, a left-hander.

The 29-year-old Quentin, who grew up in San Diego, hit .254 with 24 home runs, a career-high 31 doubles and 77 RBI in 118 games in 2011, when he made his second All-Star team.