Out
Injury Elbow
Est. Return 2/1/2026
2025 Stats
W-L
0-0
ERA
0.00
WHIP
0.00
K
0
SV
0
Rest-of-Season Projections
2025 Fantasy Outlook
Tiedemann underwent Tommy John surgery in late-July of 2024 and is unlikely to pitch in the majors until 2026. It was a predictable procedure for the talented southpaw, as he'd dealt with elbow and shoulder trouble since spring training of 2023. At his best, he'll show two monster offerings in his fastball and slider along with an above-average changeup and good enough command to start. Tiedemann could get some rehab appearances in after his 23rd birthday in August, but considering he's only logged 13 career innings at Triple-A and will likely have significant rust to knock off, a big-league debut in 2025 seems highly unlikely. He has never thrown 80 innings in a season, so even in 2026, Tiedemann's fantasy value will be affected by workload restrictions.. Read Past Outlooks
Joins 40-man roster
The Blue Jays selected Tiedemann's (elbow) contract from Triple-A Buffalo on Tuesday.
ANALYSIS
Tiedemann missed the entire 2025 season while working his way back from the Tommy John procedure he underwent in July 2024. The Jays haven't offered an update on whether he'll be ready to go by the start of spring training, but his addition to the 40-man roster ensures he won't be plucked away in the Rule 5 Draft. The 23-year-old lefty is considered one of the top pitching prospects in Toronto's system and is a candidate to make his MLB debut at some point in 2026.
Tiedemann missed the entire 2025 season while working his way back from the Tommy John procedure he underwent in July 2024. The Jays haven't offered an update on whether he'll be ready to go by the start of spring training, but his addition to the 40-man roster ensures he won't be plucked away in the Rule 5 Draft. The 23-year-old lefty is considered one of the top pitching prospects in Toronto's system and is a candidate to make his MLB debut at some point in 2026.
Pitching Stats
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Minor League Game Log
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Minor League Left/Right Pitching Splits (AAA)
Since 2023
-30%
BAA vs LHP
2025
No Stats
| BAA | K | BB | H | HR | |
|---|---|---|---|---|---|
| Since 2023vs Left | .176 | 10 | 5 | 3 | 1 |
| Since 2023vs Right | .250 | 7 | 9 | 7 | 2 |
| 2025vs Left | 0 | 0 | 0 | 0 | 0 |
| 2025vs Right | 0 | 0 | 0 | 0 | 0 |
| 2024vs Left | .111 | 6 | 5 | 1 | 1 |
| 2024vs Right | .292 | 5 | 7 | 7 | 2 |
| 2023vs Left | .250 | 4 | 0 | 2 | 0 |
| 2023vs Right | .000 | 2 | 2 | 0 | 0 |
Prospect Rankings History
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Past Fantasy Outlooks
2024
2023
A consensus top-five pitching prospect entering 2023, Tiedemann dazzled in spring training before missing a month with a sore shoulder. He exited his fourth start of the year at Double-A with biceps soreness, which ended up sidelining him for 10 weeks. Tiedemann returned to action in late-July and logged 10 full-season starts, primarily at Double-A, although he averaged less than three innings per outing as the Jays were extremely careful with his workload. The 21-year-old southpaw finished the year with one four-inning start at Triple-A and went to the Arizona Fall League to make up for lost time. He logged a 2.50 ERA, 1.11 WHIP and a 23:8 K:BB in in 18 innings across four AFL starts. Tiedemann's trademark plus changeup and slider were giving AFL hitters fits, and he touched 97 mph with his fastball. He dealt with multiple arm injuries and posted a 12 percent walk rate in 62 innings, so the red flags with Tiedemann are hard to miss. If he can hold up as a starter at Triple-A for a couple months, he could spend the rest of the season in the big-league rotation, but a zero in fantasy is also on the table for 2024.
More Fantasy News
Closing in on live BP
Tiedemann (elbow) has touched 95 miles per hour while throwing from flat ground during his rehab program, and he could advance to throwing live bullpen sessions before the end of July, Mitch Bannon of The Athletic reports.
ANALYSIS
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Aiming for late-2025 return
Tiedemann (elbow) said Friday that he hopes to be ready to pitch in games before the end of the 2025 season, Keegan Matheson of MLB.com reports.
ANALYSIS
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Set for Tommy John surgery
Tiedemann (elbow) will undergo Tommy John surgery Tuesday, Keegan Matheson of MLB.com reports.
ANALYSIS
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Will receive third opinion
Blue Jays manager John Schneider said Wednesday that Tiedemann (forearm) will receive a third opinion from Dr. Neal ElAttrache, Kaitlyn McGrath of The Athletic reports.
ANALYSIS
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Heading for second opinion
Tiedemann (forearm) will go for a second opinion after imaging Friday showed no structural damage, Keegan Matheson of MLB.com reports.
ANALYSIS
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Latest Fantasy Rumors
Set to join 40-man roster
According to Mitch Bannon of The Athletic, Tiedemann is the Blue Jays' only "must-add" player ahead of Tuesday's Rule 5 protection deadline.
ANALYSIS
The left-hander spent the entirety of the 2024 campaign rehabbing from Tommy John surgery, but he's still one of Toronto's top prospects and is an obvious candidate to be shielded from the Rule 5 Draft. Tiedemann made just eight appearances in 2024 prior to the surgery, but he should have a chance to make his MLB debut in 2026.
The left-hander spent the entirety of the 2024 campaign rehabbing from Tommy John surgery, but he's still one of Toronto's top prospects and is an obvious candidate to be shielded from the Rule 5 Draft. Tiedemann made just eight appearances in 2024 prior to the surgery, but he should have a chance to make his MLB debut in 2026.