Salas has gone 3-for-9 with two RBI and a stolen base through two games while opening the minor-league season with High-A Fort Wayne.
Salas was re-assigned to minor-league camp by the Padres on Sunday, AJ Cassavell of MLB.com reports.
The Padres announced Friday that Salas received an invitation to major-league spring training.
Double-A San Antonio placed Salas (knee) on its 7-day injured list Wednesday.
Salas is expected to miss the remainder of the season at Double-A San Antonio after being diagnosed with a right knee sprain, Jeff Sanders of the San Diego Union-Tribune reports.
Salas departed Double-A San Antonio's win over Wichita after three innings Saturday due to right knee irritation, Jeff Sanders of The San Diego Union-Tribune reports.
Salas was promoted from High-A Fort Wayne to Double-A San Antonio on Sunday, Ben Badler of Baseball America reports.
The Padres promoted Salas from Single-A Lake Elsinore to High-A Fort Wayne on Wednesday, Jeff Sanders of The San Diego Union-Tribune reports.
Over his past eight games with Single-A Lake Elsinore, Salas has slashed .400/.500/1.067 with five home runs, three doubles, one triple, 13 RBI and a 5:7 BB:K.
Salas was added to Single-A Lake Elsinore's roster Tuesday, Sam Dykstra of MiLB.com reports.