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3 Houston Astros X-factors to watch for in their first postseason

3 Houston Astros X-factors to watch for in their first postseason
Composite image by Brandon Strange.

Even though the Astros have been in the last five postseasons and made it to the World Series in three of those, they still have some new faces on the roster this year that will be participating in their first playoff games. Three of them, in particular, could have impactful enough parts to play that they shape the entire fortune of the team in these playoffs.

Trey Mancini

Although Baltimore was in the hunt until the last weeks of the season in 2022, it took getting traded to the Astros for Trey Mancini to finally get his first taste of playoff baseball. Mancini debuted in 2016, and while his numbers have been frustrating since joining his new team, he is still a powerful slugger whom the Astros should use at times in the ALDS and beyond.

Whether they need to spell Yuli Gurriel at first or use him in the outfield, Mancini will be a good weapon for the Astros, especially if he can break out of his recent funk and string together some good at-bats. Before the trade, he was batting .268, a number much more in line with his career numbers than the low .176 he had with the Astros. With the time off between the final regular season game and his first plate appearance in the playoffs, I'd expect he'll have found a way to put the slump behind him and come through with some key hits.

Hunter Brown

One of the most pleasant surprises the Astros had this year was seeing the quality they could get out of Hunter Brown from day one in the majors. After being touted as the next Justin Verlander after his six-inning shutout start in his debut, Brown made another quality start before transitioning to the bullpen.

Now, the big caveat here is that Brown actually makes the ALDS roster, which, with Houston's depth, puts a good but challenging task in front of them to assemble the proper ratio of position players to pitchers, and within the pitchers, starters to relievers. Assuming Brown makes the cut, he could be a big difference-maker.

Brown has only allowed two hits and three walks in his last three appearances, most recently logging 2.1 innings of scoreless work to lower his ERA to 0.89. He has electric stuff and would be a great asset to have in a game where maybe one of Houston's starters can't make it past a few innings, and the Astros need someone to gap between them and the other relievers.

Jeremy Peña

One first-timer that we don't have to speculate about making the roster or getting plenty of playing time is Jeremy Peña. He'll be at shortstop and probably batting second behind Jose Altuve in the lineup. Entering the year with high expectations to take over for Carlos Correa, Peña put together an outstanding rookie campaign, including launching 22 home runs, matching Correa's rookie number, and coming in first amongst AL shortstops in defensive runs saved.

One area it may take him and others combined to replace Correa is going to the plate with the game on the line and coming through in the clutch. If Peña can come up with one of those "it's my time" moments in the 2022 postseason, he'll have completed the total takeover. In any case, it will be fun to see how the rookie does his first time on the biggest stage.

One of the most well-rounded teams in the league this year, and now in the playoffs, Houston has plenty of veteran experience that will make them a tough out in any series. Add in these three players, and it shows why the Astros are coming out ahead in most people's predictions.

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Jeremy Pena and Isaac Paredes have been the Astros' best hitters. Composite Getty Image.

It’s May 1, and the Astros are turning heads—but not for the reasons anyone expected. Their resurgence, driven not by stars like Yordan Alvarez or Christian Walker, but by a cast of less-heralded names, is writing a strange and telling early-season story.

Christian Walker, brought in to add middle-of-the-order thump, has yet to resemble the feared hitter he was in Arizona. Forget the narrative of a slow starter—he’s never looked like this in April. Through March and April of 2025, he’s slashing a worrying .196/.277/.355 with a .632 OPS. Compare that to the same stretch in 2024, when he posted a .283 average, .496 slug, and a robust .890 OPS, and it becomes clear: this is something more than rust. Even in 2023, his April numbers (.248/.714 OPS) looked steadier.

What’s more troubling than the overall dip is when it’s happening. Walker is faltering in the biggest moments. With runners in scoring position, he’s hitting just .143 over 33 plate appearances, including 15 strikeouts. The struggles get even more glaring with two outs—.125 average, .188 slugging, and a .451 OPS in 19 such plate appearances. In “late and close” situations, when the pressure’s highest, he’s practically disappeared: 1-for-18 with a .056 average and a .167 OPS.

His patience has waned (only 9 walks so far, compared to 20 by this time last year), and for now, his presence in the lineup feels more like a placeholder than a pillar.

The contrast couldn’t be clearer when you look at José Altuve—long the engine of this franchise—who, in 2024, delivered in the moments Walker is now missing. With two outs and runners in scoring position, Altuve hit .275 with an .888 OPS. In late and close situations, he thrived with a .314 average and .854 OPS. That kind of situational excellence is missing from this 2025 squad—but someone else may yet step into that role.

And yet—the Astros are winning. Not because of Walker, but in spite of him.

Houston’s offense, in general, hasn’t lit up the leaderboard. Their team OPS ranks 23rd (.667), their slugging 25th (.357), and they sit just 22nd in runs scored (117). They’re 26th in doubles, a rare place for a team built on gap-to-gap damage.

But where there’s been light, it hasn’t come from the usual spots. Jeremy Peña, often overshadowed in a lineup full of stars, now boasts the team’s highest OPS at .791 (Isaac Paredes is second in OPS) and is flourishing in his new role as the leadoff hitter. Peña’s balance of speed, contact, aggression, and timely power has given Houston a surprising tone-setter at the top.

Even more surprising: four Astros currently have more home runs than Yordan Alvarez.

And then there’s the pitching—Houston’s anchor. The rotation and bullpen have been elite, ranking 5th in ERA (3.23), 1st in WHIP (1.08), and 4th in batting average against (.212). In a season where offense is lagging and clutch hits are rare, the arms have made all the difference.

For now, it’s the unexpected contributors keeping Houston afloat. Peña’s emergence. A rock-solid pitching staff. Role players stepping up in quiet but crucial ways. They’re not dominating, but they’re grinding—and in a sluggish AL West, that may be enough.

Walker still has time to find his swing. He showed some signs of life against Toronto and Detroit. If he does, the Astros could become dangerous. If he doesn’t, the turnaround we’re witnessing will be credited to a new cast of unlikely faces. And maybe, that’s the story that needed to be written.

We have so much more to discuss. Don't miss the video below as we examine the topics above and much, much more!

The MLB season is finally upon us! Join Brandon Strange, Josh Jordan, and Charlie Pallilo for the Stone Cold ‘Stros podcast which drops each Monday afternoon, with an additional episode now on Thursday!

*ChatGPT assisted.

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