By A Mystery Man Writer
What are the advantages and disadvantages of using the knuckleball as a primary pitch in baseball? - Quora
To be honest, it was the balls': Marcus Rashford plays down his amazing free-kick winner against Chelsea as he insists the lighter Carabao Cup balls helped him with knuckleball strike : r/soccer
Predicting a Baseball's Path
Sungchan Hong's research works University of Tsukuba, Tsukuba and other places
Physics can explain the fastball's unexpected twist, new study finds
Why does a cricket ball swing or a baseball curve? - Quora
Takeshi ASAI, Prof., Doctor of Engineering, University of Tsukuba, Tsukuba, Faculty of Health and Sport Sciences
Aerodynamics of the newly approved football for the English Premier League 2020–21 season
Knuckleball Research
Difference in the seam orientations (the number of seams per rotation