Yoenis Cespedes. Baseball Player Mechanics Analysis - Oakland A’s


The analysis of some aspects of the technique can help to explain the athlete’s performance, injuries and his/her future possibilities. With the information that we present in this blog I’m not intended to replace a scientifically organized evaluation process, but just to play with the available information.

Mr. Cespedes has a history of sprained left tight and knee. Also sprained right wrist.
When analyzing his batting technique we can observe an external rotation of the left foot during the swing and before contacting the ball. The angle of the left foot remains constant during the complete cycle of the batting action creating stress at the left knee level. Hyper extension of the lower back at the end of the swing is also observed.

Initial position. Knee inwards
Foot remains in place, and knee rotates outwards
Hip rotates more and the foot remains in initial position
Hip rotates more and the foot remains in initial position
Hyper extension of the lower back



During running, Cespedes hyper extends his knees before the landing with the heel in front of the body.

Knee hyper extension. Landing in front of the body with heel
Complete extension of the ankle, incomplete extension of the knee
Knee hyper extension. Landing in front of the body with heel



Conclusions: High risk of left and right knee injury. High risk of recurrence of left tight injury. Moderate risk of low back injury.

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