Wittgren allowed just two runs over 13.2 innings during July.
The rookie had his scoreless appearance streak snapped at 11 on Friday when he gave up a two-run bomb to the Cardinals' Tommy Pham. Nonetheless, he's been very effective in middle relief, owning a 2.62 ERA and 8.1 K/9, but hasn't received a save opportunity and has just two hold opportunities this season.