ST. LOUIS — Royals starter Homer Bailey had his second straight rough start. After allowing six runs over 4 1/3 innings in his previous start, Bailey got roughed up for five runs in 1 2/3 innings this time, putting the Royals in a 5-0 hole they could not overcome in a 10-3 loss to the Cardinals on Wednesday at Busch Stadium.

The two teams split the split doubleheader. The Royals won the first game, 8-2.

Marcell Ozuna powered an opposite-field three-run homer in the first off Bailey, then Matt Carpenter drilled a two-run shot in the second.

Bailey had no trouble throwing strikes — he got to two strikes on each of the first eight hitters he faced. But Bailey simply had trouble putting hitters away. In all, Bailey gave up four hits, walked two batters and hit another.

The Royals crawled back, first with a two-run third on RBI hits by Adalberto Mondesi and Jorge Soler. Hunter Dozier smoked his 10th home run this season in the fifth, making it 5-3.

But the Cardinals added a run off reliever Richard Lovelady in the sixth on Dexter Fowler’s home run, then added four more off Scott Barlow in the seventh.