What injury did Patrick Mahomes suffer and in which game
In the first quarter of Kansas City’s Week 13 contest against the Buffalo Bills in the 2023 season, Patrick Mahomes suffered a right shoulder injury while being tackled by Bills safety Jordan Poyer. The hit caused immediate pain, and Mahomes left the field for evaluation. Imaging later revealed a right AC joint sprain, classified as a Grade 1 separation, with no fracture. The injury underscored how even clean, routine tackling can impact a high-velocity passer, and it prompted close monitoring of his workload and biomechanics on throws, especially on off-platform and extended-arm releases.
Context of the injury
The shoulder AC (acromioclavicular) joint connects the clavicle (collarbone) to the acromion of the scapula (shoulder blade). A Grade 1 AC sprain involves ligament stretching or microscopic tearing without significant joint displacement. This differs from more severe separations that can involve ligament ruptures and visible deformity. For Mahomes, known for rapid releases and throwing on the run, any disruption to the kinetic chain from the lower body through the torso and into the shoulder can affect accuracy, velocity, and comfort in late-game scenarios.
Anatomy of the shoulder complex
- Acromioclavicular (AC) joint: junction where the collarbone meets the scapula
- Glenohumeral joint: ball-and-socket articulation enabling wide throwing arcs
- Rotator cuff and scapular stabilizers: control positioning during acceleration and deceleration
- Thoracic spine and core: transfer force from the ground through the kinetic chain
Immediate evaluation and diagnosis
After leaving the field, Mahomes underwent on-site assessments for range of motion, strength, and neurological checks. Subsequent MRI imaging confirmed the AC sprain without structural damage to the labrum, rotator cuff tendons, or acromioclavicular ligaments. The medical team’s conservative approach prioritized symptom-guided progression, with phased objectives from pain control and mobility to progressive resistance and football-specific drills. This structured pathway is common for joint sprains in throwers to safeguard against premature return that could exacerbate injury.
Recovery timeline and return to play
Recovery from a Grade 1 AC sprain typically spans a few days to a couple of weeks, but variability exists based on pain sensitivity, throwing mechanics, and schedule demands. Mahomes progressed through individualized milestones, including limited throwing, gradual increases in intensity, and positional reps that minimized compressive forces on the shoulder. The Chiefs and medical staff emphasized load management through the season, including adjusted practice participation and monitoring of cumulative throwing volume. By aligning his readiness with game planning, they aimed to reduce re-injury risk while maintaining competitive performance.
Performance considerations and long-term implications
Even after clinical recovery, subtle changes in release point, arm speed, or trunk rotation can affect precision, especially on deep shots or off-platform throws. Teams often conduct biomechanical analysis and velocity tracking to detect reductions in ball speed or timing irregularities. For Mahomes, the experience highlighted the importance of preseason and in-season workload monitoring, strength protocols for the rotator cuff and scapular stabilizers, and communication between coaching, performance, and medical staff. Such measures support durability without compromising the competitive edge that defines his playing style.
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Injury | Right AC joint sprain (Grade 1 separation) | Team/medical reports |
| Game | Week 13, 2023 season, Chiefs vs Bills | Play-by-play and injury reports |
| Mechanism | Tackle by Bills safety Jordan Poyer causing immediate shoulder pain | Game footage and reporting |
| Imaging | MRI showed no fracture, dislocation, or rotator cuff tear | Medical evaluation summary |
| Recovery approach | Conservative, symptom-guided progression with phased rehab | Team medical protocol |
| Return timeline | Symptom-controlled return within the same season, managed workload | Depth chart and practice reports |
Takeaways for athletes and fans
Patrick Mahomes’ AC joint sprain illustrates how routine tackles in football can affect throwers with high velocity and complex release patterns. Recovery prioritized diagnostic clarity, conservative management, and gradual exposure to football demands. For athletes, the case underscores the value of kinetic-chain awareness, targeted strengthening, and transparent communication among medical and performance teams. Fans gain insight into how teams balance game-week decisions, workload adjustments, and long-term durability to protect elite performance over a season and beyond.