San Francisco Giants at Arizona Diamondbacks (2026-07-01). Trevor McDonald vs Zac Gallen at Chase Field.

Trevor McDonald enters this matchup with a season ERA of 4.94 and a WHIP of 1.35 over 51 innings pitched, showing a moderate strikeout rate of 7.94 K/9 and a walk rate of 3.35 BB/9. His recent trend indicates a downward movement in ERA, and he has a 50% quality start percentage, suggesting some reliability. Zac Gallen, on the other hand, has struggled more this season with a 6.15 ERA and a 1.58 WHIP across 86.1 innings, accompanied by a lower strikeout rate of 5.42 K/9 and a similar walk rate of 2.81 BB/9, with his ERA trending upwards and a quality start percentage of only 16.7%.

The Giants' offense maintains a .254 batting average and a .724 OPS, having scored 343 runs this season, indicating a solid offensive capability. Their pitching staff holds a 4.37 ERA and a 1.37 WHIP, allowing 85 home runs. The Diamondbacks' offense carries a .238 batting average and a .697 OPS, scoring 363 runs, slightly more than the Giants despite a lower OPS. Arizona's pitching has a 4.30 ERA and a 1.29 WHIP, but they have allowed significantly more home runs with 104.

Recent head-to-head contests between these two teams have seen a mix of outcomes, with the Giants winning 7 of the last 13 meetings. The total line for this game is set at 9.5 runs, which appears to align with the higher ERAs of both starting pitchers and the Diamondbacks' tendency to allow more home runs, suggesting potential for offense. Given Gallen's struggles and McDonald's improving trend, the matchup could lean towards more run production.