SEATTLE - Doug Brocail is the Rangers pitching coach. It’s what you might call a “high stress” position, by nature. And when the two aces, Yu Darvish and Cole Hamels, struggle on back-to-back days, you would think the stress sky rockets.

But Tuesday, Brocail looked as happy as a kid eating an ice cream cone.

Maybe that was because he was actually eating an ice cream, but we digress. In between licks of the legendary soft-serve available in the visitor’s clubhouse at Safeco Field, it was clear, it wasn’t just about the ice cream cone.

Before getting to desert, he had digested a bunch of video on Hamels, then spent a bullpen session working with Darvish. With both, he suggested the fixes for their recent problems were relatively simple.

“I’m not concerned about either of them,” Brocail said. “We identified it. And once they got to see it, they realized the fix. And the fix should be pretty easy. With [Darvish], it was like night and day. Once the light went on, the bullpen was really, really good.”

In short, Darvish’s delivery had changed to a point where he was not getting on top of the ball and Hamels had somehow shortened his stride on the mound that left him leaving balls over the heart of the plate.

As a result, the duo combined to allow 12 runs in 5.2 innings over the previous two days. The rough stretch, actually encompasses both pitchers’ last two turns. They’ve combined to allow 21 runs in 16.2 innings. Batters have hit .351 with a .438 on-base percentage.

To be safe, the Rangers may fiddle with the rotation anyway. Colby Lewis made his final rehab start on Monday and rejoined the team in Seattle. He is expected to be activated later this week and could start as early as Saturday.

The Rangers could start Darvish on normal rest Friday against the Los Angeles Angels in Anaheim, start Lewis Saturday and give Hamels an extra day of rest this time through. Darvish would then get extra rest the next time through the rotation. Manager Jeff Banister declined to name probably starters for the weekend and will wait until Wednesday.

As far as adjustments, Darvish was thinking along the same lines as Brocail. He spent all day Monday hunched over an iPad looking at video and also consulted data sites such as Brooksbaseball.net to discover how he had altered his delivery and why his wipeout slider has been “flat” all year.

He saw the same thing. His arm slot had gotten too high and too close to his head, not allowing him to fully get the kind of leverage he needs on the ball.

Darvish said he’d spent so much time working on his fastball as he rehabbed that he may have neglected both his slider and changeup.

“I didn’t spend as much time on the mechanics as I should have,” Darvish said. “I have to use more time now and make adjustments. If I do that, I can make myself better quickly. I thought today went well. I thought the slider and the changeup were both good.”

Hamels spent his Tuesday watching video in the manner that Darvish had the day before. On Wednesday, he will work on lengthening his stride back out to help return the sink to his fastball.

The process goes on.

Because at the end of the year, the object is not to share ice cream cones in the clubhouse, but champagne.

Twitter: @Evan_P_Grant