15-Day IL
Injury Hamstring
Est. Return 4/16/2025
2025 Stats
W-L
0-0
ERA
0.00
WHIP
0.00
K
0
SV
0
Rest-of-Season Projections
2025 Fantasy Outlook
Giolito's first season with Boston ended before it began when he suffered an elbow injury in spring training that required surgery. Doctors opted for an internal bracing procedure, which gave Giolito a chance for a normal offseason. He began throwing in August and was in Fort Myers on a throwing program during the offseason. There could be restrictions early on, but Giolito is expected to be at spring training with other pitchers. He received Cy Young votes every season from 2019 to 2021, but his career arc took a hit in 2023 when he gave up 41 home runs with a 41.9 percent hard-hit rate. He said the troubles were due to falling behind batters and missing location in the zone. Thought of as a front-end starter after signing with Boston, it's a good bet that the organization isn't counting on a top-of-the-rotation starter in 2025, but the 30-year-old should have a spot at the back end. Read Past Outlooks

Close to rehab assignment
Red Sox manager Alex Cora said Saturday that Giolito (hamstring) threw a bullpen session Friday and could begin his rehab assignment with Triple-A Worcester in the coming week, Mac Cerullo of the Boston Herald reports.
ANALYSIS
Giolito opened the season on the 15-day injured list due to a left hamstring strain that he sustained in mid-March. He wasn't shut down from throwing, and it appears he's progressed enough in his program to be closing in on a rehab assignment. There's optimism that the 30-year-old right-hander will be able to return to the Red Sox's rotation in mid-April.
Giolito opened the season on the 15-day injured list due to a left hamstring strain that he sustained in mid-March. He wasn't shut down from throwing, and it appears he's progressed enough in his program to be closing in on a rehab assignment. There's optimism that the 30-year-old right-hander will be able to return to the Red Sox's rotation in mid-April.
Pitching Stats
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Minor League Game Log

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Left/Right Pitching Splits
Since 2023
-9%
BAA vs LHP
2025
No Stats
BAA | K | BB | H | HR | ||||
---|---|---|---|---|---|---|---|---|
Since 2023vs Left | .226 | 86 | 38 | 63 | 17 | |||
Since 2023vs Right | .249 | 118 | 35 | 106 | 24 | |||
2025vs Left | 0 | 0 | 0 | 0 | 0 | |||
2025vs Right | 0 | 0 | 0 | 0 | 0 | |||
2024vs Left | 0 | 0 | 0 | 0 | 0 | |||
2024vs Right | 0 | 0 | 0 | 0 | 0 | |||
2023vs Left | .226 | 86 | 38 | 63 | 17 | |||
2023vs Right | .249 | 118 | 35 | 106 | 24 | |||
More Splits→ | View More Split Stats |
Home/Away Pitching Splits
Since 2023
-41%
ERA at Home
2025
No Stats
ERA | WHIP | IP | K/9 | BB/9 | |||||
---|---|---|---|---|---|---|---|---|---|
Since 2023Home | 3.58 | 1.03 | 88.0 | 10.0 | 2.9 | ||||
Since 2023Away | 6.07 | 1.57 | 96.1 | 9.9 | 4.2 | ||||
2025Home | 0 | 0 | 0 | 0 | 0 | ||||
2025Away | 0 | 0 | 0 | 0 | 0 | ||||
2024Home | 0 | 0 | 0 | 0 | 0 | ||||
2024Away | 0 | 0 | 0 | 0 | 0 | ||||
2023Home | 3.58 | 1.03 | 88.0 | 10.0 | 2.9 | ||||
2023Away | 6.07 | 1.57 | 96.1 | 9.9 | 4.2 | ||||
More Splits→ | View More Split Stats |
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Defensive Stats
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Past Fantasy Outlooks
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2013
In 2022, Giolito registered a 4.90 ERA but a 3.66 xFIP and 3.79 SIERA portended a rebound last season. Things did not turn out as hoped for as Giolito recorded a 4.88 ERA pitching for three different teams. This time, the bloated ERA was mostly supported by its estimators as the righty's control and command suffered all season. Fanning 204 in 184.1 innings was solid, but a 9.2 percent walk rate and 41 homers surrendered were major reasons the White Sox and Angels gave up on Giolito before the pitching desperate Guardians picked him up to absorb innings down the stretch. Giolito's velocity and pitch mix was in sync with recent seasons, and after signing a two-year deal (with an opt-out after the first year) with Boston, there's hope that new pitching coach Andrew Bailey can help Giolito maximize a sweeper and return to the form he showed in the first half last year with Chicago (3.45 ERA). Giolito misses bats and hasn't missed more than a start or two every season since 2018, although he'll now be pitching in his most hitter-friendly home park to date.
More Fantasy News

Goes on 15-day IL
The Red Sox placed Giolito (hamstring) on the 15-day injured list Thursday, Mac Cerullo of the Boston Herald reports.
ANALYSIS
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Will open season on injured list
Red Sox manager Alex Cora said Thursday that Giolito (hamstring) will open the season on the 15-day injured list, Julian McWilliams of The Boston Globe reports.
ANALYSIS
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Tending to low-grade strain
Giolito was diagnosed Tuesday with a low-grade left hamstring strain, Jen McCaffrey of The Athletic reports.
ANALYSIS
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MRI on tap
Giolito (hamstring) is scheduled to undergo an MRI on Wednesday, Ian Browne of MLB.com reports.
ANALYSIS
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Hamstring injury 'very minor'
Giolito believes the left hamstring injury that forced him from Tuesday's outing against the Phillies to be "very minor," Mac Cerullo of the Boston Herald reports.
ANALYSIS
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Latest Fantasy Rumors

Mets have strong interest
The Mets are "showing strong interest" in Giolito, Mike Puma of the New York Post reports.
ANALYSIS
The Mets fell short in their bid for Yoshinobu Yamamoto, but they're still in the market for rotation reinforcements. Giolito has some of the best upside of any free-agent starter still on the market and, at 29, is also one of the youngest. The right-hander collected a disappointing 4.88 ERA over 184.1 innings in 2023 but also struck out 200-plus batters for the third time in his career.
The Mets fell short in their bid for Yoshinobu Yamamoto, but they're still in the market for rotation reinforcements. Giolito has some of the best upside of any free-agent starter still on the market and, at 29, is also one of the youngest. The right-hander collected a disappointing 4.88 ERA over 184.1 innings in 2023 but also struck out 200-plus batters for the third time in his career.