13.5%: Merrill Kelly's K-Rate Vanished, and the D-backs Have No Answer

Alright, Emerald City, let's talk about what's going down out there in the desert. We've got the Diamondbacks facing off against the Angels today, with Merrill Kelly on the mound for Arizona against Reid Detmers. But honestly, the real story isn't just about this one game. It's about a problem that's been quietly brewing for the D-backs pitching staff, and man, is it a head-scratcher: where did all their strikeouts go?!

The Great K-Rate Mystery: Starters Are Faltering

Seriously, something is up with the D-backs' arms. This year, their entire pitching staff has only managed to fan 18.8% of batters faced. That's a huge drop from last year's 20.8%, and way down from 21.2% and 22.2% in the seasons before. Sure, league-wide strikeouts are down a bit, maybe because of ABS, but not *this* much. The D-backs are sitting ahead of just the Rockies in that stat, which is just wild, right?

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And here's the kicker: it's not the bullpen. Those guys are actually doing a bit better, fanning 21.0% of batters compared to 20.6% in 2025. Nah, the blame falls squarely on the starting pitchers. Their K-rate has absolutely plummeted from 21.0% last season to a dismal 17.5% this year. What happened? It's even odder when you consider the bulk of the rotation are the same guys who were out there last season.

Their Aces Are Missing Something Big

Honestly, things would be even worse if it wasn't for new arrival Michael Soroka, whose 24% K-rate is the best among their rotation. But for everyone else, it's a clear, and in some cases, super sharp, decline. Look at these numbers for their five returning starters:

• Brandon Pfaadt: dropped from 19.2% to 15.1%
• Eduardo Rodriguez: down from 20.6% to 17.9%
• Merrill Kelly: a shocking plummet from 23.5% to just 13.5%
• Ryne Nelson: slid from 20.5% to 17.5%
• Zac Gallen: fell from 21.5% to 14.8%

It's not just the percentages, either. Among 114 pitchers with at least sixty innings this year, Zac Gallen is ranked 109th and Merrill Kelly is way down at 113th. Kelly is only ahead of Colorado's Tomoyuki Sugano! Last year, Merrill had sixteen starts with more than 5 strikeouts, but this year? Just one. Both he and Zac are seeing fewer called and swinging strikes, and conversely, batters are making more contact when they swing at pitches outside the zone. That's a huge factor in why they're struggling, but the fact it's happening across the entire rotation makes you wonder if there's a bigger, team-wide problem they need to figure out.

So, what does this all mean for the D-backs as they take on the Angels today? With Merrill Kelly getting the start, the pressure is on him to find those missing Ks. Or is this a deeper, team-wide issue that's gonna haunt them all season? We'll definitely be watching!

This article was created with AI assistance and reviewed by Seattle On Tap editorial staff. Always verify information with official team sources.