CHICAGO -- The Kansas City Royals acquired shortstop Paul DeJong from the Chicago White Sox on Tuesday, adding infield depth to a playoff contender, sources familiar with the deal told ESPN.

Class A pitcher Jarold Rosado will head to the White Sox to complete the deal, a source said later Tuesday.

DeJong, 30, has 18 home runs in 102 games for Chicago after signing a 1-year, $1.75 million deal last offseason. He's played mainly at shortstop -- a position occupied by Bobby Witt Jr on the Royals -- but recently has seen time at third base as well.

An eight-year veteran, DeJong has a career .715 OPS having played for St. Louis, Toronto and San Francisco before signing with the White Sox.

DeJong will only need to change dugouts as Chicago is hosting Kansas City in a series this week.

Later Tuesday, the Royals were also finalizing a deal to acquire right-handed reliever Lucas Erceg from the Oakland Athletics, sources told ESPN's Jeff Passan.