Former Aces outfielder is off to a red-hot start with the Diamondbacks in the big leagues.
Arizona's rightfielder led off Sunday's game against the Nationals with his second home run in three games.
Oeltjen went 3-for-4 on the day with an RBI and an error and is now hitting .400 for the Diamondbacks.
Arizona lost 9-2 to the Nationals giving Washington the series sweep and its eighth straight victory.