60-Day IL
Injury Elbow
Est. Return 2/1/2026
2024 Stats
W-L
0-0
ERA
0.00
WHIP
0.00
K
0
SV
0
Rest-of-Season Projections
2024 Fantasy Outlook
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. Read Past Outlooks
Set for Tommy John surgery
Tiedemann (elbow) will undergo Tommy John surgery Tuesday, Keegan Matheson of MLB.com reports.
ANALYSIS
After seeking multiple opinions on his elbow, Tiedemann ultimately decided to go under the knife. He'll miss the rest of the 2024 season as a result of the procedure and most, if not all, of the 2025 campaign. Arguably the top pitching prospect for the Blue Jays, Tiedemann started four games for Triple-A Buffalo this season, posting a 6.00 ERA, 2.22 WHIP and 11:12 K:BB across nine innings.
After seeking multiple opinions on his elbow, Tiedemann ultimately decided to go under the knife. He'll miss the rest of the 2024 season as a result of the procedure and most, if not all, of the 2025 campaign. Arguably the top pitching prospect for the Blue Jays, Tiedemann started four games for Triple-A Buffalo this season, posting a 6.00 ERA, 2.22 WHIP and 11:12 K:BB across nine innings.
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2023 Fantasy Outlook
A southpaw with a prototypical 6-foot-4, 220-pound frame, good athleticism and loud stuff, Tiedemann's ascent from the 91st overall pick in 2021 to one of the best pitching prospects alive was one of the storylines of the minors, especially in the first half of the season. He logged a 2.17 ERA, 0.88 WHIP and 117:30 K:BB in 78.2 innings during a three-level climb from Single-A to Double-A, all as a 19-year-old. The walk rate was a tad high at times, but hitters couldn't do much when they made contact (three HR with a .149 batting average against). His mid-90s fastball and low-80s slider project as plus pitches, while his mid-80s changeup is his best pitch and one of the best changeups in the minors. Pitching prospects often prove that development is not linear, but a first-half MLB debut is possible in 2023 if he picks up where he left off last season.
More Fantasy News
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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Avoids serious injury
Recent testing showed Tiedemann isn't dealing with any structural damage in his forearm or elbow, Scott Mitchell of TSN.ca reports.
ANALYSIS
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Exits Triple-A start early
Tiedemann was removed from his start Wednesday at Triple-A Buffalo due to left forearm tightness, Shi Davidi of Sportsnet.ca reports.
ANALYSIS
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Dominant in Single-A
Tiedemann (elbow) struck out five over 2.1 scoreless, no-hit innings in a rehab start for Single-A Dunedin on Wednesday.
ANALYSIS
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Latest Fantasy Rumors
Second-half promotion possible
Tiedemann could be an option for the Blue Jays' rotation after the All-Star break, Kaitlyn McGrath of The Athletic reports.
ANALYSIS
Tiedemann experienced a meteoric rise up prospect lists as a result of a dominant 2022 season which saw him hold a 2.17 ERA, 0.86 WHIP and 117:29 K:BB over 78.2 innings across three levels. He won't turn 21 until August and "needs to be tested" at Triple-A first, per McGrath, but the talented left-hander might push to debut during the second half. He'll be in major-league camp this spring as a non-roster invitee.
Tiedemann experienced a meteoric rise up prospect lists as a result of a dominant 2022 season which saw him hold a 2.17 ERA, 0.86 WHIP and 117:29 K:BB over 78.2 innings across three levels. He won't turn 21 until August and "needs to be tested" at Triple-A first, per McGrath, but the talented left-hander might push to debut during the second half. He'll be in major-league camp this spring as a non-roster invitee.