Trey Yesavage could return to Blue Jays as soon as Monday after rehab start Tuesday

Trey Yesavage threw a 30-pitch bullpen session at Rogers Centre on Saturday morning and followed it with light fielding drills, putting him on track for a Triple-A rehab start with Buffalo on Tuesday and a potential return to the Toronto rotation as soon as next week, per AJ Eustace of MLB Trade Rumors.

What happened

Pitching coach Pete Walker described Yesavage as having "looked great" in the session, and manager John Schneider told Sportsnet's Hazel Mae that a return to the majors on Sunday or Monday next week is possible — "most likely Monday," in Schneider's words. Keegan Matheson of MLB.com reported the Tuesday rehab start with Triple-A Buffalo.

The timing matters. Toronto sits one game back of Cleveland for the final AL Wild Card spot, with 12 games remaining to at least match the Guardians' regular-season record. The Blue Jays hold the tiebreaker advantage, having won the season series between the two clubs four games to two. Getting a starting pitcher back from the injured list in the final week of the regular season is, to put it gently, not nothing.

Why it matters

Yesavage has been on the injured list since August 5th with left knee inflammation. When he went down, Toronto stood at 54-61 — multiple teams separated them from the Wild Card cut line, and the Rangers were the benchmark they were chasing. The club has gone 21-11 in the 32 games since, a stretch that MLB Trade Rumors attributes to a resurgent offense and the continued dominance of Dylan Cease — who started Saturday's game and earned the win with five innings of one-run ball.

That run has carried Toronto to the edge of the postseason picture, and Yesavage's potential return adds a rotation option for the final push. Per the report, if his Tuesday rehab start goes well, he could throw around 60 pitches on Monday the 21st against the Orioles, with the possibility of bumping that up slightly if he starts in the regular-season finale on September 27th. That workload, MLB Trade Rumors notes, would position him for close to a full complement of pitches if Toronto catches Cleveland and reaches the playoffs.

This is a report, not a club announcement. The return timeline depends entirely on how Tuesday goes in Buffalo.

It is also worth noting that Yesavage has navigated two separate IL stints this season. A right shoulder impingement kept him off the Opening Day roster and pushed his season debut back to April 28th. The current stint for left knee inflammation is a distinct issue, but the injury history is part of the context any club weighs when managing a pitcher's workload in September.

The numbers

Yesavage has posted a 3.65 ERA across 18 starts in his healthy stretches this season. His 23.6% strikeout rate sits a bit above league average, and his ability to suppress hard contact has been a genuine strength: opponents have managed a 34.0% hard-hit rate against him, which ranks in the 82nd percentile per Statcast.

The picture is not uniformly rosy. His walk rate and ground-ball rate are both below average, and his 4.58 SIERA — a metric that accounts for the quality of contact and the strikeout-to-walk profile — suggests the 3.65 ERA has had some fortune baked in. Opponents carry a .215 average on balls in play against him, which is well below what most pitchers sustain over time. MLB Trade Rumors acknowledges the luck component directly while noting that bottom-line run prevention still counts as a success.

So: a pitcher who limits hard contact, generates strikeouts at a slightly above-average clip, and has benefited from favorable sequencing. The ERA is real; the sustainability of it is the open question. For a team trying to win 12 games in 12 days, "real ERA, uncertain SIERA" is a trade-off most clubs would accept.

Where the club stands

Toronto enters Sunday at 75-75 (.500), sitting fourth in the AL East and 15.5 games back in the division race — eliminated from that chase. The Wild Card is the only path, and per MLB Trade Rumors the Blue Jays rank fourth in the AL Wild Card standings, 1.0 relative to the cut line, riding a two-game winning streak.

Sunday brings the Orioles to Rogers Centre, with Dylan Cease lined up against Trevor Rogers. Monday features the Detroit Tigers, with José Soriano taking the ball against Troy Melton. Tuesday's probable starter against Detroit is listed as TBD — which, depending on how the Buffalo rehab start goes, may or may not remain that way for long.

What we don't know yet

The return is contingent, not certain. Schneider's "most likely Monday" framing, relayed by Hazel Mae of Sportsnet, is a projection built on a successful Tuesday rehab outing. If Yesavage encounters any setback in Buffalo, the timeline shifts. The report does not specify what threshold the club is using to evaluate the rehab start, nor does it address whether any remaining concerns about the left knee extend beyond the general progress of the rehab.

Under general league mechanics, a pitcher on a rehab assignment has up to 30 days before the club must act — activate him or make another roster decision. With 12 games left in the regular season, the calendar is doing most of the managing at this point.

What to watch

**Is Yesavage's Tuesday rehab start the last hurdle before a return?**

Per the report, a clean outing in Buffalo sets up a return on Monday the 21st against the Orioles, with roughly 60 pitches as the projected workload. The club has not announced a roster move, and none should be expected until after Tuesday's start at the earliest.

Beyond Yesavage, Toronto has been managing a busy rehab pipeline. A week removed from Anthony Santander beginning a rehab assignment at Triple-A Buffalo — recovering from left shoulder surgery — the Blue Jays are navigating the September stretch with multiple players working their way back through the system. Whether any of those threads converge into meaningful contributions before the regular season ends remains to be seen.

For now, the number that matters most is one — as in, one game back of Cleveland, with 12 to play and a tiebreaker already in hand. Yesavage's bullpen session on Saturday morning was 30 pitches. Tuesday in Buffalo will tell the rest of the story.