We talk about the Great Home Run Surge of 2019, the Rabbit Ball, Slippier in the Air Ball, the call up of Vladimir Guerrero Jr. and Alex Rodriguez on YouTube.

Links:

• Moonshot: The Baseball Is Juiced (Again) by Robert Arthur
• Moonshot: Exit Velocity Is Higher Than Ever by Robert Arthur
• Moonshot: The Rabbit Ball is Flying in Triple-A Too by Robert Arthur
• The Call-Up: Vladimir Guerrero Jr. by Jarrett Seidler and Kevin Jebens
• Circle Change: Who’s Hitting the Extra Dingers? by Zach Crizer
• Kendall's writing for the Prospectus Notebook
• ARod on YouTube

We talked with Jared Diamond about recent MLB rules changes. Specifically related to one of our favorite subjects, two-way players. We address how teams will have to designate players as, pitchers, hitters, or two-way and what effect those rules will have on the game. We also get a peak into Jared's upcoming book.

Harry and Kendall also dig into some of the upcoming changes that MLB will be testing out in the Atlantic League.

We chatted with the creators and maintainers of four major projection systems, ZiPS (Dan Szymborski), Steamer (Jared Cross), THE BAT (Derek Carty) and Baseball Prospectus' PECOTA (Harry Pavlidis) about how their systems are created, how the past is used to project future performance and how projecting young players without much track record can be tricky.

Music is "Open Your Face" by Parker Projection.