Pirates starting pitcher Charlie Morton was knocked around in the opening game of a day-night doubleheader Thursday against the Orioles.

Morton scattered four runs -- two earned -- on seven hits in 5 1/3 innings, dropping to 0-4 on the year. He issued two walks and struck out four, improving his ERA from 4.35 to 4.21. Since the starting the season tossing six shutout innings against the Cubs, Morton has allowed 22 runs -- 17 earned -- over his last 30 1/3 innings.

Morton will look for his first win of the season Tuesday at home against San Francisco.