Noteworthy OOPSY ROS Projections for Bats: April Edition

Now that one month of the season is in the books, it’s a fine time to check which hitters have improved their projections the most. To do this, I’ll refer to OOPSY rest of season (ROS) projections, a system I introduced at FanGraphs this offseason. OOPSY ROS is updated each day. Even though I focus on OOPSY ROS in this article, most of the referenced players have improved their projections across the different systems available at FanGraphs. For each player, I’ll also offer commentary on where I’d draft them in a standard 15-team Main Event league that was starting today, informed by a healthy mix of the FanGraphs auction calculator using OOPSY ROS and vibes.
Bear in mind that, across all projection systems, pre-2025 data still weighs much more heavily than 2025 data as pre-2025 covers a much larger sample of data. In fact, a single season typically never comprises more than half of the weight in a projection system, as projection systems usually weigh at least three years of historical data. Nonetheless, enough of the season is now in the books for certain players to have meaningfully altered their projections. The numbers referenced in this piece were collected on April 26th. I’ll take a look at pitchers in my next piece.