The Padres optioned Gillaspie to Triple-A El Paso on Wednesday.
Gillaspie will lose his spot in the major-league bullpen as the Friars make room for Martin Perez, Tanner Scott and Bryan Hoeing -- all of whom were acquired Tuesday ahead of the trade deadline. After his promotion to San Diego on July 10, Gillaspie allowed three earned runs in 5.2 innings while striking out one batter and walking none.