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Ricky Tiedemann ranks as Blue Jays Nation’s seventh-best prospect in 2025 mid-season update
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Photo credit: © Nathan Ray Seebeck - Imagn Images
Ryley Delaney
Sep 12, 2025, 14:00 EDTUpdated: Sep 6, 2025, 07:38 EDT
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Ricky Tiedemann’s prospect shine has worn off over the past year and a half solely because he hasn’t been healthy.
This is Blue Jays Nation’s annual mid-season prospect list, where we’ll take a look at the 50 best prospects in the Toronto Blue Jays organization. I’ll look at the player’s stats, what other publications have to say, as well as my own observations of the players.
Formerly ranked as our first-best prospect for four consecutive rankings, Tiedemann now ranks as Blue Jays Nation’s seventh-best Blue Jays’ prospect, as he hasn’t pitched since last July. If you missed who ranked eighth, you can read about RJ Schreck here.
Getting to know Ricky Tiedemann…
Position: Starting pitcher
Throws: Left
Born: August 18th, 2002
Acquired: Third round, 2021 MLB Draft
Previous ranking: Fourth (2025 mid-season)
Standing at 6’4”, 220 lbs, the Blue Jays selected Tiedemann in the third round of the 2021 draft, signing the left-handed pitcher to a bonus of a little under $650,000. His well-documented 2022 season was terrific and catapulted him up the Jays’ prospect rankings.
Starting the year in Single-A, Tiedemann posted a 1.80 ERA and 2.09 FIP in 30 innings pitched, with a 44.5 K% and an 11.8 BB%. With the High-A Vancouver Canadians, Tiedemann posted a 2.39 ERA and 2.92 FIP in 37.2 innings pitched, with a 36 K% and an 8 BB%. He made four starts with the Double-A New Hampshire Fisher Cats, posting a 2.45 ERA and 2.23 FIP in 11 innings pitched, with a 34.1 K% and 9.8 BB%.
Altogether, Tiedemann finished the 2022 season with a 2.17 ERA and 2.51 FIP in 78.2 innings pitched, with a fantastic 38.9 K% and a respectable 9.6 BB%. The lefty was shut down in August due to hitting his pitch limit, but there were tons of positives to take away from this season.
Then, 2023 happened. When healthy, Tiedemann had a 5.06 ERA and 2.12 FIP in 32 innings pitched with the Fisher Cats, with a 39.7 K% and 13.7 BB%. He even earned a start with the Triple-A Buffalo Bisons at the end of the season, pitching four scoreless innings. However, he missed a significant portion of the season due to a bicep injury and struggled with command when healthy.
Both issues hampered his 2024 season as well. Tiedemann made as many rehab starts as he did starts with the Bisons. In those four starts in Triple-A, Tiedemann had a 6 ERA and 10.46 FIP in nine innings of work, with a higher BB% (24.5%) than K% (22.4%) – good for a batter, not so much for a pitcher.
In his July 10th start against the Lehigh Valley IronPigs, Tiedemann was pulled after one inning, with the Blue Jays’ pitching prospect later getting Tommy John surgery. It looked as if he could start toward the end of the season, but there isn’t much time left in the minor league season, so a stint in the Arizona Fall League may be the best option. Tiedemann is also Rule 5 eligible, and he’s basically a lock to be added to the 40-man roster.
Despite the long-term injury, Tiedemann is still highly regarded in prospect circles, ranking as MLB Pipeline’s fourth-best prospect in their mid-season update, as well as ranking in a few Top 100 lists. Pipeline notes that his fastball sits in the mid-90s, but touches as high as 98 mph, and has actually touched 99 mph.
The fastball is graded at 65, as is his slider. Tiedemann’s changeup isn’t as good, only being graded at 55, which is still above-average. All three pitches are helped by his arm slot, and he can pitch to both lefties and righties when healthy. Control is where he struggles the most, given a grade of 45.
If Tiedemann can stay healthy, he has ace potential written all over him. Worst-case scenario, he becomes a high-leverage reliever, but let’s hope he ends up being the former.
Ryley Delaney is a Nation Network writer for Blue Jays Nation, Oilersnation, and FlamesNation. She can be followed on Twitter @Ryley__Delaney.

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