Jameson Taillon’s season is over, and the next stop in his story is a medical one.
The Blue Jays right-hander said he won’t pitch again this year, and he’s set to get another opinion on his elbow from Dr. Keith Meister next week. Taillon was placed on the injured list last week with elbow inflammation, and while Toronto manager John Schneider had left the door open for a possible return, Taillon has now shut that down.
The bigger concern is what comes next. Taillon admitted that when the elbow discomfort flared up and ended his final start after just two innings, he briefly wondered whether he had thrown the last pitch of his big league career. A week and a half later, he says he’s feeling better and is “pretty committed to creating a plan of attack and giving it another good go.”
That uncertainty lands at a rough time for a veteran pitcher heading into free agency. It’s also been a brutal year on the mound for Taillon, his worst since he signed the four-year, $68MM deal with the Cubs before the 2023 season. Chicago designated him for assignment in late July, and the Blue Jays acquired him on Aug. 2 for cash or a player to be named later.
Before the move, the numbers were ugly. Taillon carried a 5.92 ERA through 15 starts, had thrown 76 innings, and posted a 20.9% strikeout rate that matched his career mark.
His 8.3% walk rate was a career high, though still better than league average. The real damage came from the ball leaving the yard: he gave up 25 home runs, or 2.96 per nine innings.
That rate ranked behind only 2017 Josh Tomlin and 2019 David Hess for the highest single-season HR/9 mark by any pitcher with at least 70 innings this century. Some of that was probably bad luck, since Taillon entered the year with 12.2% of his fly balls turning into homers and then watched that number jump to 21.4% before his DFA. But the contact profile was rough too, with a career-low 33.8% ground-ball rate and a career-best 51.3% fly-ball rate.
The pitch mix wasn’t helping. Taillon’s 91.8 mph average four-seamer with the Cubs was the lowest of his career, and hitters punished it: nine home runs, a 93.9 mph average exit velocity and a 21.3% barrel rate.
Toronto did get a small sample of better results. In 10 innings, Taillon allowed four runs for a 3.60 ERA, but he also gave up two home runs, nine hits and five walks while striking out eight of 44 batters.
The Blue Jays were hoping the move might give him a chance to stabilize in a rotation that needed arms, but that never materialized. He’d already missed time with the Cubs in June and July because of a hamstring strain, and with Toronto he’s now been on the injured list for forearm tendinitis and elbow inflammation.
So Taillon heads into the offseason with a career-high 5.65 ERA and a lot to sort through. His strikeout, walk and swinging-strike rates were all near league average, and his walk rate was a touch better than that, but the home runs are the issue he’ll have to solve if he wants the rebound to come.
A team looking for pitching depth, especially in a roomy home park, could still see a fit. For now, though, everything depends on what Dr.
Meister says next week.
Before this season, Taillon had been relatively durable since returning from his second UCL reconstruction. From 2021 through 2025, he averaged 28 starts and 155 innings per year, and he hadn’t gone on the injured list for an arm issue until this latest stretch with Toronto. The former No. 2 draft pick in 2010 and once top prospect has a 3.99 ERA across 1323 major league innings.
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