Just a personal opinion, but sport specific training involves the sport. This is practice time with the sport coach using the ball/equipment/surface that the sport is played with/on. Calling plyometrics and strength training “sport specific training” is more of a marketing technique than an accurate description of the training session. A better term (although less flashier) is “exercises with a high degree of transferability to the field of play”. Or just plyometrics.
I think the most important part of this section was the caution given regard to the volume and rest period required for plyometrics. This isn’t conditioning. This is training the body to be more explosive. A tired athlete isn’t an explosive athlete. Thank you for mentioning that athletes should be doing strength training before going into plyometrics. A general rule of thumb is that they should be able to squat their bodyweight before going into plyometrics.