I have not seen anyone commemt on this, and my apologies for the tardiness of this...BUT...
After yesterday's game on MLB network, the round table had Pedro Martinez and Harold Reynolds on it... and they were commenting on the Mariners, which is mostly common basic stuff. Until Pedro is asked about Taijuan, and is there anything Pedro would like to see Taijuan do differently. Pedro went off. I do not recall EVER hearing Pedro giving such detailed and specific suggestions.
Pedro said that Taijuan looked a bit stiff, and Pedro believes that Taujuan needs to lengthen his stride, to let the true Taijuan athlete out. Further, Pedro thinks the over simplifed delivery is making Taijuan much too hittable. If Taijuan would hide the ball more, Taijuan would be an elite pitcher immediately.
Lastly, and most surprising... Pedro said that he was surprised about how little that Taijuan uses the rubber. Per Pedro, Taijuan pushes off the rubber using his toes. Per Pedro, the proper way to push off the rubber is with the entire foot, which then fully engages the lower half of the body which then takes pressure off the arm, elbow and shoulder... AND could add velocity to Taijuan's pitches as well.
I know we all love Taijuan, but this dissection of Taijuan was more than unique. It was harsh, and very to the point.