The centerpiece of the Tarik Skubal trade brings his triple-digit heat to Comerica Park. Monitor his rising four-seamer and secondary command as he tests his reconstructed elbow.
River Ryan will make his Tigers debut Monday against the Washington Nationals, giving Detroit its first major league look at one of the key pieces acquired in the Tarik Skubal trade.
He made four starts with the Dodgers in 2024, posting a 1.33 ERA over 20 1/3 innings before undergoing Tommy John surgery later that season. His 2025 season was lost to rehab, and hamstring problems have limited his workload again in 2026. That context is important because Monday should be viewed less as a finished-product evaluation and more as an opportunity to see whether the stuff that made Ryan an intriguing pitching prospect before surgery has returned.
The early returns suggest that it has. Ryan's four-seam fastball averaged 97.4 mph in his most recent start for Triple-A Toledo and reached 98.7. In his first outing with the Mud Hens, he averaged around 97 mph and topped out at 98.2. MLB Pipeline has his fastball operating in the 96-99 mph range with the ability to reach triple digits, but velocity is only part of what makes the pitch interesting. Ryan gets good induced vertical break on the four-seamer, allowing him to work above barrels at the top of the strike zone.
That is the first thing I would watch Monday. If Ryan is sitting 96-98 mph and getting Washington hitters underneath the four-seamer, the arm strength should not be much of a concern.
The second pitch to watch is his slider.
Ryan threw the slider 22.7% of the time during his brief major league run in 2024, second only to his four-seamer at 40%. Hitters missed on 30.6% of their swings against it, and the pitch held opponents to a .208 average and .250 slugging percentage in a small sample. His curveball generated an even higher whiff rate at 37.5%.
The quality of the slider is not really the question. His ability to locate it is.
That was the issue during his second Toledo start. Ryan threw only six sliders, missed badly with several of them and left one in the zone that Michael Chavis hit for a home run. Another hanging slider resulted in a hard-hit RBI double. The four-seamer looked good in the same outing, and all three changeups he threw in the strike zone generated whiffs.
That makes the secondary command something worth following against Washington.
Ryan also has more variety than his fastball-slider combination suggests. During his four starts with Los Angeles in 2024, Statcast classified six pitches: four-seamer, slider, curveball, sinker, changeup and cutter. His curve sat around 83 mph, the changeup around 90, the sinker around 95 and the cutter around 94. That gives him several velocity bands and different movement profiles instead of forcing him to live entirely with upper-90s velocity.
The changeup could be particularly interesting against Washington's left-handed hitters. Ryan flashed it against Toledo, and MLB Pipeline describes it as a sinking upper-80s offering. If Detroit wants to keep hitters from simply looking fastball and reacting to the slider, establishing the changeup gives him another way to attack the opposite side of the platoon.
I would not put much emphasis on Ryan's final pitching line Monday. He threw only 23 pitches in his first Toledo outing and 39 in his second, so Detroit has been gradually building him back up rather than treating him like a fully stretched-out starter. AJ Hinch had already said the organization wanted to continue extending him while making sure he remained healthy.
There are more useful things to watch: where the four-seam velocity sits, whether he can locate the slider below the zone instead of leaving it over the plate, how often he uses the changeup and curveball, and whether the delivery and command remain consistent as his pitch count climbs.
Ryan already showed in 2024 that his stuff can get major league hitters out. Monday is Detroit's first opportunity to see how much of that pitcher is back and what he might look like heading into 2027.
