The Padres selected Solak's contract from Triple-A El Paso on Saturday.
Solak failed to break camp with the Padres but has been impressive at Triple-A, slashing .333/.412/.512 with nine homers, 40 RBI and 51 runs scored across 241 plate appearances. He'll now join the major-league roster following Miguel Andujar's (hamstring) move to the IL and could make an occasional start for San Diego, thanks to his defensive versatility.