Sardinas was traded to the Padres on Monday in exchange for a player to be named later, Bob Dutton of the Tacoma News Tribune reports.
Sardinas was DFA'd by Seattle last week after hitting just .181 in 72 major league at-bats. The 23-year-old, who hit .252 at Triple-A, will provide depth at shortstop for San Diego and could see some playing time as a potential stopgap at the position in 2017.