But he’s learned a lot on this journey.
“I feel like I've gotten a lot closer with my faith, with Jesus, and I think that's just allowing me to be free, be who I am, not try to be someone that I think someone else wants me to be,” he said, “and just be a better teammate, be a better guy around the clubhouse, just go about my work, knowing that if this didn't come true, I'd be OK with that.
“But now that it’s here, it’s pretty freaking cool.”
The 26-year-old lefty had appeared in 21 games for Round Rock this season, posting a 2.76 ERA, a 0.95 WHIP, a .185 opponent batting average and 10.13 K/9 rate in 29 1/3 innings.
When he was called up, he ranked among Pacific Coast League leaders (min. 25 IP) in WHIP (first), opponent on-base percentage (first, .241), opponent slugging (second, .269), opponent OPS (second, .510), K/BB ratio (second, 4.13), ERA (fourth) and opponent average (fourth).
The southpaw carries a career 14-18 record, 17 saves and a 3.70 ERA over 181 Minor League games (18 starts) spanning five seasons in the Rangers organization.
And while the debut had been front of mind, right now, he’s just focused on helping a Rangers pitching staff that has been in much need of reinforcements lately.
“Pitching-wise, I'm just trusting myself, trusting my strengths, not trying to do too much,” Ahlstrom said. “Again, not trying to be someone else or be a different pitcher. I’ve been finding out what works and figuring out how I can repeat that, and just fine-tune that.”