Athletics at Arizona Diamondbacks (2026-07-21). Jack Perkins vs Kohl Drake at Chase Field.
Starters — Jack Perkins has a 6.75 ERA and 1.42 WHIP across 62.2 innings, with strong swing-and-miss ability at 10.91 K/9 but shakier control at 3.45 BB/9 and 1.58 HR/9. His last three starts were uneven: 5.0 IP, 3 ER, 4 K, 1 BB; 3.0 IP, 3 ER, 2 K, 2 BB; and 3.2 IP, 7 ER, 8 K, 4 BB. The recent trend is down, with shortened outings and damage on contact. Kohl Drake has a 1.80 ERA and 1.20 WHIP in 5.0 innings, with 9.0 K/9, 3.6 BB/9, and no home runs allowed. His only listed recent start was 5.0 IP, 1 ER, 5 K, and 2 BB. The sample is very small, so the surface numbers are encouraging but still unproven over workload.
Teams — Oakland brings the better offensive line on paper with a .731 OPS, .247 average, and 453 runs scored, but the broader form is poor at 2-8 over the last 10 games. The Athletics’ pitching staff has been a major issue, carrying a 5.28 team ERA and 1.47 WHIP, which raises pressure on Perkins to work deeper than he has lately. Arizona owns a .694 OPS, .237 average, and 439 runs, so the lineup has been less productive overall, but the Diamondbacks are in better recent form at 6-4 in their last 10. Their team pitching has also been steadier, posting a 4.21 ERA and 1.28 WHIP, giving them a cleaner baseline entering this matchup.
