When Is an Athlete Really Back?

Tyler Seguin's injury history raises an interesting question about rehabilitation, return to play and what it actually means to restore an athlete.

Tyler Seguin has been through a remarkable amount of rehabilitation during his NHL career.

A partially lacerated Achilles, a calf injury immediately after returning, a fractured heel, shoulder surgery, major hip surgery, knee surgery, severe quadriceps loss and nerve dysfunction, surgery on the opposite hip, and now an ACL reconstruction.

Yet after all of that, Seguin recently described his current ACL rehabilitation as perhaps the most challenging of his career.

That caught my attention.

This isn't a young athlete experiencing his first major injury. Seguin has spent more than 15 years playing professional hockey and has gone through multiple major surgeries and rehabilitation programs with some very well-respected people in sports medicine and performance.

His story made me think about a question I've wrestled with throughout my career.

After significant trauma, are we really restoring an athlete to what existed before the injury? Or are we helping the body adapt and build the best possible solution around what has changed?

If it's the latter, there is another question worth asking.

Do the timelines and demands of professional sport actually allow enough time to do that?

The Achilles

In March 2016, Seguin suffered a laceration to his right Achilles tendon when an opponent's skate blade cut through approximately 15% of the tendon.

He underwent surgery and returned about a month later during the Dallas Stars' playoff run.

In his first game back, he injured his calf and missed the remainder of the playoffs.

Looking back afterward, Seguin acknowledged that he didn't yet have all of his strength back.

I find that distinction interesting.

Clearly, enough boxes had been checked for Seguin to return to NHL hockey. He had healed sufficiently, progressed through rehabilitation, returned to skating and ultimately received clearance to play.

But was the entire system back to where it had been before the injury?

That's a different question.

This isn't about criticizing the decision to return him. Seguin wanted to play, his team was in the playoffs and qualified medical and performance professionals were involved.

It simply illustrates how different healed enough to play can be from fully restored.

Research following Achilles tendon rupture—not the same injury as Seguin's traumatic partial laceration—has demonstrated that deficits in calf strength, muscle size and tendon-muscle function can persist well beyond the initial rehabilitation period. Long-term changes in tendon mechanical properties and muscle function have also been documented.

The body heals, but that doesn't necessarily mean it returns to exactly what existed before.

Rebuilding a right leg

Seguin's 2020–21 rehabilitation makes that point even more clearly.

Following the 2020 playoffs, he underwent surgery to repair a complete labral tear in his right hip. The recovery became significantly more complicated when he developed nerve dysfunction and profound loss of his right quadriceps. He also underwent arthroscopy on the right knee.

Seguin later described essentially losing his entire quad.

During his rehabilitation with longtime performance coach Matt Nichol and chiropractor Mike Prebeg, the starting point wasn't NHL performance. It was basic function.

Nichol has described the progression as first regaining things such as knee flexion, the ability to stand on one leg and the ability to squat his own body weight. From there they gradually progressed toward skating, harder skating, equipment and eventually hockey.

These are highly experienced and well-respected practitioners working with an elite athlete with access to NHL-level medical resources.

And the process was still extraordinarily difficult.

Seguin described progress as slow and meticulous. There were periods where attempts to move forward resulted in having to take a step backward again.

Eventually the challenge wasn't only physical. He began wondering whether he would play again and, if he did, what kind of player he would be.

Nichol has spoken about rehabilitation in terms that I think are important. Sometimes the job isn't simply fixing a shoulder, hamstring or knee. It's helping an athlete regain his identity.

That gets much closer to what rehabilitation really involves.

We aren't rehabilitating an isolated hip or knee.

We're rehabilitating the person attached to it.

Does trauma permanently change the system?

This is where Seguin's history becomes interesting to me.

After significant physical trauma, is it actually possible to restore an athlete exactly to what existed before?

I'm not convinced we can always assume that it is.

That doesn't mean an athlete can't return to the same level of performance. In some cases, an athlete may ultimately become stronger or perform better than before.

But something has happened.

Tissue has been damaged. Surgery may have changed anatomy. Periods of unloading have altered strength and tissue capacity. Sensory information may change. Motor strategies can reorganize. Confidence in the injured area can change.

The body adapts.

That adaptation isn't necessarily negative. In many ways, it is exactly what allows human beings to recover from significant injuries.

Maybe the better question isn't whether compensation exists.

Maybe it's whether the athlete has regained enough options.

Can the athlete solve movement problems in different ways? Can the system tolerate fatigue, unexpected contact, awkward positions, high speed and unpredictable changes in direction?

For a hockey player, what happens when an edge catches differently than expected, another player falls into him, or he has to produce force from a position that can't be reproduced perfectly in a rehabilitation setting?

Those questions are harder to answer with a strength test or a predetermined return-to-play battery.

What does “return to play” actually mean?

Sports medicine has increasingly recognized that return to sport isn't a single event.

The 2016 Bern Consensus Statement proposed a continuum:

Return to participation → Return to sport → Return to performance.

I think that distinction is important.

An athlete can return to training without being ready for competition. An athlete can return to competition without having returned to his previous level of performance.

And an athlete can be medically cleared while still rebuilding qualities that may take considerably longer to restore.

Return-to-sport decisions are therefore better understood as risk-management decisions rather than declarations that an athlete is completely restored.

The Bern consensus also recognizes something that is particularly relevant in professional sport: acceptable risk is influenced by context. Career stage, competitive level, the importance of an upcoming event, and social and financial considerations can all influence the decision.

That's the reality of professional sport.

How much time does professional sport really have?

A professional hockey organization has two responsibilities that don't always fit perfectly together.

It needs to look after the health of its players.

It also needs those players to play hockey.

Players have relatively short careers. Teams have competitive windows. Coaches and general managers are judged on results. Organizations are paying star players millions of dollars.

The athletes themselves are often the ones pushing hardest to return.

So imagine a player nine months removed from surgery.

The tissue has healed. His testing looks good. He's skating. His confidence is improving. The medical staff believes the risk is acceptable and the player desperately wants to play.

Would another month of rehabilitation make him better?

Probably.

What about three months?

Six months?

At what point does additional optimization become outweighed by the cost of not playing?

There isn't an easy answer.

ACL reconstruction illustrates this problem particularly well.

Research shows that deficits in strength, neuromuscular function, proprioception and movement strategy can persist well beyond surgery. Some aspects of biological and functional recovery may continue for considerably longer than the timelines typically used to return professional athletes to competition.

At the same time, simply waiting longer isn't the answer.

Research has shown a relationship between return timing and reinjury risk after ACL reconstruction, particularly in younger athletes, but current return-to-sport thinking increasingly emphasizes criteria-based progression rather than clearance based solely on the calendar.

Then there is psychological readiness.

An athlete's confidence in the reconstructed knee, fear of reinjury and belief in his ability to perform again can meaningfully influence return.

So when exactly is the athlete ready?

Nine months doesn't answer that question.

Neither does a strength test.

Neither does an MRI.

They're pieces of the decision, but they aren't the athlete.

Seguin's ACL brings the question full circle

Seguin tore the ACL in his right knee in December 2025 after becoming tangled with another player.

The mechanism is important because I don't think it's reasonable to look backward and claim that his previous Achilles, hip or knee problems caused this ACL injury.

We simply don't know that.

But I also don't think we should pretend that the athlete entering ACL rehabilitation is a blank slate.

This is a right leg that has previously experienced an Achilles laceration, a major hip injury and surgery, a knee arthroscopy, nerve dysfunction and profound quadriceps loss.

It belongs to an athlete with more than 15 years of NHL exposure and several major rehabilitation experiences behind him.

That history doesn't explain why his ACL tore.

But it matters when you're trying to rebuild him afterward.

Interestingly, Seguin has said there isn't really an established roadmap for what he's going through.

He has spoken with other NHL players who have had ACL reconstruction and found that their experiences aren't necessarily comparable. Associated injuries differ. Surgical procedures differ. Progressions differ.

There isn't an “open book” telling a hockey player exactly when he should skate, cut or progress.

Seguin has also spoken about learning to trust that the reconstructed ACL is working.

Then, in June, he experienced a setback that forced him to stop skating.

He's skating again now, but he isn't committing himself to an arbitrary return date.

For an athlete who has spent much of his career coming back from injuries, perhaps that's significant.

Maybe clearance isn't the finish line

This is where I think we may need to change the way we think about return to play.

Maybe medical clearance isn't the end of rehabilitation.

Maybe it's simply another stage of it.

There are things we cannot completely recreate in a gym or rehabilitation setting: the speed of NHL hockey, contact, fatigue, unpredictability, decision-making and the emotional pressure of competition.

Eventually the athlete has to return to that environment.

Competition itself becomes another exposure.

That doesn't mean we should keep athletes out indefinitely searching for some theoretical state of perfect restoration.

It means the work shouldn't necessarily stop once they return.

Continue rebuilding strength and capacity. Continue exposing the athlete to different movement problems. Continue monitoring how the system responds. Continue rebuilding confidence and expanding the athlete's available options.

The athlete can be playing while still reconditioning.

Maybe the goal isn't to recreate the athlete who existed before

I don't think Tyler Seguin's injury history proves that one injury caused another.

There are too many variables, too many years and too much exposure to professional hockey to make that claim.

But his history does make me question the way we sometimes think about rehabilitation.

Every new injury happens to an athlete who already has a history.

The ACL isn't walking into the rehabilitation room by itself.

Tyler Seguin is.

He brings previous injuries, surgeries, training history, movement strategies, confidence, fears and previous rehabilitation experiences with him.

So maybe asking whether the ACL is ready isn't enough.

We need to ask whether Tyler is ready.

And even when the answer becomes yes, the work may not be finished.

Perhaps significant trauma means we can't always recreate exactly what existed before.

Maybe that's not the goal.

Maybe the goal is to understand what has changed and help the athlete build the strongest, most adaptable system possible from where he is now.

And maybe return to play isn't the end of that process.

It's simply the next part of it.

References

Ardern CL, Glasgow P, Schneiders A, et al. 2016 Consensus statement on return to sport from the First World Congress in Sports Physical Therapy, Bern. British Journal of Sports Medicine. 2016;50:853–864.

Grindem H, Snyder-Mackler L, Moksnes H, Engebretsen L, Risberg MA. Simple decision rules can reduce reinjury risk by 84% after ACL reconstruction: the Delaware-Oslo ACL cohort study. British Journal of Sports Medicine. 2016;50:804–808.

Nagelli CV, Hewett TE. Should Return to Sport be Delayed Until 2 Years After Anterior Cruciate Ligament Reconstruction? Biological and Functional Considerations. Sports Medicine. 2017;47:221–232.

Beischer S, Gustavsson L, Hamrin Senorski E, et al. Young Athletes Who Return to Sport Before 9 Months After Anterior Cruciate Ligament Reconstruction Have a Rate of New Injury 7 Times That of Those Who Delay Return. Journal of Orthopaedic & Sports Physical Therapy. 2020;50:83–90.

Xiao M, van Niekerk M, Trivedi NN, et al. Patients Who Return to Sport After Primary Anterior Cruciate Ligament Reconstruction Have Significantly Higher Psychological Readiness: A Systematic Review and Meta-analysis of 3744 Patients. American Journal of Sports Medicine. 2023;51:2774–2783.

Achilles research note: Research concerning long-term Achilles deficits largely examines Achilles tendon rupture rather than traumatic partial laceration. It provides useful context for the discussion but should not be interpreted as evidence of what specifically occurred in Seguin's case.