Mathews (0-2) took the loss against the Phillies on Saturday, allowing seven runs on 10 hits and one walk with three strikeouts over five innings.
Mathews endured two blowup innings despite throwing 67 of 99 pitches for strikes and allowing just two extra-base hits. It was the worst of the 25-year-old's three starts with the Cardinals, and he's struggled to exceed five frames despite throwing 95 pitches or more in each outing. He owns an inflated 6.43 ERA, 1.79 WHIP and 13:7 K:BB across 14 major-league innings and lines up for a home matchup with the Pirates next weekend.