The Marlins acquired Pauley, Robby Snelling, Adam Mazur and Jay Beshears from the Padres on Tuesday in exchange for relievers Tanner Scott and Bryan Hoeing, Christina De Nicola of MLB.com reports.
The Padres optioned Pauley to Triple-A El Paso on Saturday.
Pauley is starting at third base and batting ninth in Saturday's contest against the Blue Jays, Jeff Sanders of The San Diego Union-Tribune reports.
Pauley was optioned to Triple-A El Paso on Tuesday.
Pauley is out of the lineup Sunday against the Giants.
Pauley went 1-for-2 with a three-run home run in Saturday's loss to San Francisco.