Seam-Shifted Wakes

Link to Part 1 Link to Part 2 Link to Part 3 Link to Part 4 Starting with the 2020 season, Seam-Shifted Wake entered the baseball lexicon. It was mentioned on broadcasts by David Cone (who took time to let me explain it), Ron Darling, and Mike Petriello. Traffic on Continue Reading

What did we know and when did we know it? Link to Part 1 Link to Part 2 In Part 3, I’ll discuss the discovery of Seam-Shifted Wake. I began trying to explain how sinkers work in earnest in early 2000. Initially, led by the ideas of Driveline and their Continue Reading

What we knew and when we knew it Link to Part 1 In Part 2, I’ll talk about our early baseball measurements. In 2017, I had a notion to try to measure flow over a baseball with PIV. I hired an undergraduate student to build trigger electronics. He mostly completed Continue Reading

What did we know, and when did we know it? I’ve decided to write down the whole thing. I have several motivations. None of this will be about what SSW is or how it works. That’s in the various posts in this blog and our published articles. Part 1 will Continue Reading

This is the third post based on John Garrett’s MS Thesis. Like 73, this won’t stand on its own. I recommend starting back at 72. Since the start of this work, all of our measurements have been made at 90 mph. We chose that number using what a friend of Continue Reading

Part 1 was focused on non-spinning balls in a 4S configuration at 90 mph. This post will turn the ball 90º to focus on 2S orientations. In the next post, we’ll talk about results from lower and higher speeds followed by spinning baseballs. For each of these cases, there are Continue Reading

My (now former) student, John Garrett (@jwillyg20) has been working on new measurements of Seam Shifted Wake (SSW) for a couple of years. He just wrapped them up around Christmas and will soon finalize his MS thesis. This and the next few posts will be based on that work. You Continue Reading