Fantasy Baseball Injury Report - Updates for Kodai Senga, Jackson Merrill, Byron Buxton, Royce Lewis, Matt Chapman, Tyler Glasnow, Evan Carter, more

Dave Funnell's Fantasy Baseball Injury Report - Week 12 Updates on Kodai Senga, Jackson Merrill, Byron Buxton, Royce Lewis, Matt Chapman, Tyler Glasnow, Evan Carter, more.

Welcome, RotoBallers, to my fantasy baseball injury report for June 15. Every week, we look back at the major injury developments in baseball and look ahead at what might transpire. Today, we examine recent injuries and updates for Kodai Senga, Tyler Glasnow, Anthony Santander, Isaac Paredes, Matt Chapman, Jackson Merrill, and more.

Injuries are an unfortunate part of the game, but how you handle them can mean the difference between a last-place finish and somewhere near the top of your league's standings.

The hope is that whatever comes your way, you can understand what the injury is, what it means for your fantasy team, and what actions you should take. Let's get right to this week's injury-related news.

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Kodai Senga, SP, New York Mets

Carlos Mendoza says that Kodai Senga has a Grade 1 hamstring strain:

"We're looking at probably two weeks, 14 days before we re-evaluate again." pic.twitter.com/Msd8I86lQn

— SNY (@SNYtv) June 14, 2025

On Friday, a day after injuring his hamstring while catching an errant toss from Pete Alonso while covering first base, the Mets placed their ace on the 15-day injured list with a Grade 1 strain. While this is relatively good news given the circumstances, this is a significant blow to the team and to fantasy owners everywhere.

He will be re-evaluated in two weeks to assess the progress of his healing.

Recovery from a hamstring injury is difficult, especially for pitchers. Their biggest asset is their arm, and keeping it active and loose is difficult when their legs are hampered. Most pitchers have their own routine, such as the windup, and it's next to impossible to maintain that timing and physicality when they can't use their legs.

Even still, a light game of catch, while good to keep their arms somewhat fresh, isn't nearly enough, causing them to require additional time for mechanical and velocity issues. As such, the next two weeks will be crucial to ensure that he doesn't do further damage to an already ailing hamstring.

Where does New York go from here? Looking at recent history, Spencer Strider missed about one month with a similar injury earlier this year. Shota Imanaga, on the other hand, remains out of action more than a month after his hamstring strain. It's player-dependent on how the healing process develops.

Luckily, reinforcements are on the way. Both Frankie Montas and Sean Manaea have begun their respective rehab assignments.

And while both have struggled as of late, they're using this time for some fine-tuning and "spring training-like" build-up to be ready for in-game action. They also welcomed back Paul Blackburn, who can do his best to replace Senga, despite being less talented. All in all, it's not the end of the world for the Mets, but none of them will replace what Senga was doing for them this season.

They are all rosterable in deep leagues.

Here's what else is happening in the wonderful world of injuries.

MLB Injury News Quick Hits

Tyler Glasnow threw to live batters on Friday, tossing a simulated inning's worth of work. The team felt that this was a promising development, but how his body heals in the coming days will be the key in deciding their next course of action.

Jackson Merrill had a scary injury on Saturday, as he attempted a steal and came up looking quite woozy. On Sunday, the team officially placed him on the 7-day concussion IL.

Jackson Merrill is "woozy," per Mike Shildt. Shildt said they have not made a decision yet whether he is in concussion protocol (at least not one they can share). #Padres https://t.co/ab8YOBufAa

— Annie Heilbrunn (@annieheilbrunn) June 15, 2025

After visiting with a hand specialist, it was revealed that Matt Chapman would be able to begin rehabbing at some point this week. The hope is for him to return sooner than the original timeline and possibly before the All-Star break.

After missing time on Saturday with a wrist injury, Evan Carter was able to return to the starting nine on Sunday.

Meanwhile, the Rangers' pitching staff faces yet another hurdle here, as Tyler Mahle will hit the injured list and Kumar Rocker will get the call back to the majors. It's very unfortunate if true, as Mahle's biggest downfall is his inability to stay healthy, while Rocker's profile seems tailor-made for the bullpen, but Texas always seems to need him to start games for them.

The Rangers will recall Kumar Rocker to start Sunday against the White Sox.

— Evan Grant (@Evan_P_Grant) June 15, 2025

Masataka Yoshida has begun ramping up his throwing, which is the one thing he was unable to do for so long. While this is a promising development for the talented hitter, it remains unknown how he fits into the Red Sox's plans. He feels like a prime candidate to be traded, but his health and salary feel like two major hurdles in his way.

The Astros have yet to place Isaac Paredes on the injured list with his hamstring strain. While the severity has yet to be revealed, the team is hopeful that short-term rest will be enough for him to return in short order.

Anthony Santander has been missing from the Blue Jays' lineup since the end of May, and since then, he has received a PRP injection in his ailing shoulder. Now that it has started its process, the Jays are keeping him in a "stand pat" mode where he isn't even swinging a bat. It's frustrating for anyone who used a top 100 pick on him, but it makes sense for the Blue Jays to take things slowly.

Update on Anthony Santander: He's actually not hitting yet, only throwing, which he's starting this week.

No timeline for him to start hitting yet, so this is clearly still going to take some time. #BlueJays

— Keegan Matheson (@KeeganMatheson) June 14, 2025

Royce Lewis was sent to the injured list with a left hamstring strain for the second time this season. The uber-talented yet often-injured Twin will miss at least ten days with this ailment, though it's unclear of the severity of the situation. Given that this is a recurring injury, there is a chance that he will miss more than 10 days.

Byron Buxton exited Saturday's game after being hit by a pitch on his left elbow. This looked awful.

Byron Buxton got drilled on the elbow by a 95 mph sinker from Hunter Brown.
He’s staying in… but that looked brutal.
The Twins cannot afford to lose him again.
Tough as nails.#MNTwins pic.twitter.com/GrBxsrly48

— Talkin' Twins (@TalkinTwins) June 14, 2025

The hope is that this isn't as serious as it looked, but Buxton has a history of injuries that can't be ignored. He is currently in the middle of his best season in quite some time, proving that a healthy Buxton is best for baseball. He was initially expected to start on Sunday but was a late scratch.

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