Northcraft signed a minor-league contract with the Padres on Sunday that includes an invite to major-league spring training.
The Padres released Northcraft on Tuesday.
The Padres designated Northcraft for assignment Friday.
Northcraft was optioned to Triple-A El Paso prior to Sunday's game against the Astros.
Northcraft was recalled by the Padres on Saturday.
Northcraft was optioned to San Diego's alternate training site Monday.
Northcraft pitched two scoreless innings in relief against the Dodgers on Saturday, allowing one hit and one walk while striking out a pair.
Northcraft's contract was selected by the Padres on Friday.
Northcraft is part of the Marlins' 60-man player pool, Craig Mish of SportsGrid.com reports.
Northcraft signed a minor-league contract with the Marlins on Wednesday that includes an invitation to spring training.