Padres starting pitcher Eric Stults endured a rough outing as he suffered his fourth loss of the season Friday night against the Diamondbacks.

Stults (4-4), who made his 10th start of the season, pitched six scoreless innings before allowing four runs in the seventh. He was charged with four runs and six hits over 6 1/3 innings of work. He struck out two and walked two in a 5-2 defeat.

Stults has allowed eight runs over his last 19 2/3 innings of work. He is scheduled to make his next start Wednesday at home against the Mariners. He is 2-1 with a 4.24 ERA in four starts at Petco Field.

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