Improved Red Sox Pitching Staff Has Been Shockingly Dominant

After an uneven start to the season, the Boston Red Sox have been one of the best teams in baseball for nearly three months now. Since losing to the New York Yankees on June 6, they’ve gone 43-25 — the best record in the American League and the second-best record in baseball behind only the historically hot Milwaukee Brewers (49-20).

While the Red Sox’s offense has picked up thanks to the arrival of Roman Anthony and resurgences from Trevor Story and Jarren Duran, much of the team’s success has come on the mound. Since June 10, Boston leads MLB with a 3.19 ERA — an impressive feat for a team playing half its games at Fenway Park.

The starters and relievers have both been excellent, posting identical 3.19 ERAs. That’s the best rotation ERA and third-best bullpen ERA in baseball during that stretch.

The rotation has come on strong after a shaky start. While Garrett Crochet (14-5, 2.38 ERA) has been outstanding all year and is a frontrunner to win the AL Cy Young Award, Bryan Bello and Lucas Giolito have stepped up, giving the Red Sox a formidable trio at the top of their rotation.

Best ERAs among qualified American League starters since June 10:

1. Trevor Rogers – 1.52 ERA
2. LUCAS GIOLITO – 2.31 ERA
3. Tarik Skubal – 2.40 ERA
4. GARRETT CROCHET – 2.41 ERA
5. BRAYAN BELLO – 2.50 ERA

Three Red Sox starters in the top five.

— Joe Weil (@Joe_Weil) August 27, 2025

Bello has taken a big step forward in his fourth season, going 10-6 with a personal-best 3.07 ERA — nearly a full run lower than his career mark (4.06). He’s been remarkably consistent, allowing three earned runs or fewer in 21 of his 23 starts and posting a 2.71 ERA over his last 16 outings.

Giolito’s also rounded into form after a sluggish start, notching the best full-season ERA (3.47) of his career alongside a 9-2 record. He’s been even better lately, too, going 8-1 with a 2.31 ERA over his last 14 starts.

Meanwhile, Boston’s bullpen has been sensational. Aroldis Chapman and Garrett Whitlock have been lights-out all summer, effectively shortening games by two innings. Since June 1, they have a combined 1.06 ERA and a 35.9% strikeout rate in 59 1/3 innings.

Steven Matz has provided a boost as well, contributing an 0.87 ERA in nine appearances since being acquired from the St. Louis Cardinals at the MLB Trade Deadline.

With the Red Sox dominating on the mound and at the plate (they rank fourth in MLB in runs per game), they look like a legitimate World Series contender heading into the final month of the season. Their staff could get even deeper, too, if top prospects Payton Tolle and Luis Perales are promoted when rosters expand in September.