The Padres recalled Morejon from Triple-A El Paso on Friday.
Morejon pitched two-thirds of an inning during San Diego's series in South Korea but was optioned to Triple-A ahead of its domestic opener. He's given up two runs across 6.1 minor-league frames and will now return to the Padres to provide additional bullpen depth. Pedro Avila was designated for assignment in a corresponding move.