Aaron Ashby and the Pursuit of Quirky Baseball History

When a starter builds an 8-0 record, it usually signals a Cy Young contender. When a reliever does it, the achievement carries a different tone. It's usually a mildly interesting statistical aberration, because it's usually a reliever's record at the end of a full season. Only five relievers have won eight or more games and lost zero in a season this century: Arthur Rhodes (2001), Rheal Cormier (2003), Micah Owings (2011), Nate Jones (2012) and Nick Sandlin (2024). That's not a list of the best relievers of the last three decades; it's just a neutral bit of fun.

What Aaron Ashby is doing—he's 8-0 less than a third of the way through the Brewers' season—is different, and a whole lot more interesting. The 27-year-old left-hander from Kansas City (and nephew of former big-leaguer Andy Ashby) is putting together a 2026 season worthy of a frame. Through his first 21 appearances, Ashby owns an 8-0 record, a 2.17 ERA, and 44 strikeouts across 29 innings.

Over his last eight outings, Ashby has recorded at least one strikeout in each, combining for 20 strikeouts in 13 ⅔ innings. During that span, he has allowed only three hits to 54 opposing hitters. Everything else about the profile borders on absurdity: he has surrendered just one home run all season (hit by Jonny DeLuca on March 30), while striking out 36.4% of batters and generating ground balls at a 58.1% rate.

One of the most surprising numbers is his .361 opponent BABIP. That sounds unusually high, right? And honestly, it doesn’t quite match the level of dominance he has shown to begin the year. He suppresses home runs. He disrupts timing with an elite strikeout rate. Opponents are producing only a 37.1% Hard Hit rate against him.

So what explains it? Yes, the heavy ground-ball rate plays a role, because grounders turn into hits more often than flies (at least the flies that stay in the park). But the BABIP issue goes deeper. Opponents have found unusual success on line drives against Ashby, going 12-for-14. He's limiting damage in the air a bit better; he might just be trading some extra line-drive singles for that.

Ashby's statistics command attention on their own. But when you place them beside the handful of pitchers in baseball history who opened a season with at least eight wins and zero losses, Ashby’s name starts to carry a legendary echo.

A small club with enormous names
According to Stathead, Ashby has entered a list that is both exclusive and remarkably diverse. From baseball’s old-school era to the modern game, only 11 pitchers have opened a season 8-0 in their first 21 games. Of those, only five have come since the integration of the game in 1947.

• Brooks Lawrence (1956, CIN): 12-0, 3.48 ERA, 42 strikeouts in 111 1/.3 innings.
• Roy Face (1959, PIT): 8-0 as a pure reliever, 1.45 ERA, 31 strikeouts in 37 ⅓ innings.
• Dave McNally (1969, BAL): 12-0, 2.85 ERA, 88 strikeouts in 139 innings
• Arthur Rhodes (1996, BAL): 8-0, 3.92 ERA, 52 strikeouts in 43 ⅔ innings as a reliever/swingman.
• And now, Aaron Ashby (2026, MIL): 8-0, 2.17 ERA, 44 strikeouts in 29 innings.

What separates Ashby from the rest (and what has Milwaukee dreaming) isn't simply the unbeaten record, but how he's doing it. Right now, he is the most overpowering strikeout pitcher on that list. The closest pitcher to Ashby is Rhodes, who had an impressive 28.2% strikeout rate through his hot start to 1996 but can't keep pace.

The achievement becomes even more impressive when viewed through Milwaukee history. Since the franchise began, only 38 times has a Brewers pitcher opened a season with at least 25 innings pitched and zero losses. That list includes bullpen giants such as Josh Hader (70 strikeouts, 2-0 in 2018), Dan Plesac (31 strikeouts, 1-0 in 1988), Corbin Burnes (28 strikeouts, 4-0 in 2018), and Bryan Hudson (37 strikeouts, 4-0 in 2024).

Among that group, Ashby owns the franchise record for most wins, with eight. No other pitcher in Brewers history had ever reached 8-0 in that span. In strikeouts, he ranks second with 44, trailing only Hader’s 70. In K/9 (13.7), he is also second, again behind Hader. That he's won so many games might be fluky, but there's nothing unearned about it. His dominance rivals even that of the much more obviously overwhelming Hader.

He features a sinker that can touch 98 mph, though he deploys it selectively because his true weapons are the slider and curveball. He's generated 16 strikeouts with each pitch, meaning 73% of his 44 strikeouts have come from that devastating combination of breakers. Opponents own a whiff rate of 70.4% against his slider and 61.5% against his curveball. Those numbers belong on some other planet. Hitters are 0-for-20 with 16 strikeouts and a microscopic .010 expected slugging percentage against the curveball. The league is also just 3-for-15 with seven strikeouts against his changeup, which carries a 56.3% whiff rate and which Ashby loves to call his favorite pitch—even though it's hard for it to grab attention in this thicket of elite weapons.

In a bullpen forced to navigate injuries and constant adjustments, Ashby has become Pat Murphy’s favorite weapon—the changeup in his skipper's arsenal. His 1.31 WHIP is more than acceptable for a high-volume reliever, and his inherited-runner numbers reveal something scouts call “big-game nerve.”

Most impressive of all his numbers, arguably, is the innings count. Ashby remains on pace to pitch 100 innings this season, which would be an extraordinary achievement for a 21st-century reliever. Being as electric as he has been across a volume this large is unfathomable in the modern game. He probably won't stay undefeated or maintain a strikeout rate that reads like Peak Ichiro's batting average, but Ashby balances ability and availability in a way that makes 8-0 feel like a fair representation of his value to this team—which is saying an awful lot.