Valdez (elbow) was granted his release from the Giants earlier this month, Matt Eddy of Baseball America reports.
Valdez was designated for assignment Friday, Henry Schulman of the San Francisco Chronicle reports.
Valdez was called up from Triple-A Sacramento prior to Thursday's game against Philadelphia, Alex Pavlovic of NBC Sports Bay Area reports.
Valdez was cut from the Giants' spring training and reassigned to minor league camp Monday, Henry Schulman of the San Francisco Chronicle reports.
Valdez signed a minor-league contract with the Giants on Thursday, Chris Cotillo of SB Nation reports.
Valdez was outrighted to Triple-A El Paso on Thursday.
Valdez was designated for assignment by the Padres on Monday.
Valdez was promoted by the Padres on Friday, Jeff Sanders of the San Diego Union-Tribune reports.
Valdez was called up to the big league roster, Jeff Sanders of The San Diego Union-Tribune reports.
Valdez was optioned to Triple-A El Paso on Wednesday.