Primary projections
Primary projection systems are generated independently and do not merge any of the others.
Zippers: ZiPS projections are maintained by Dan Szymborski and have been available on FanGraphs since 2010. ZiPS will be updated as necessary in the run-up to the season and will be updated daily throughout the season. You can read more about ZipS here.
Zips DC: ZiPS DC is exactly the same as ZiPS, except it is prorated for our RosterResource playtime projections. ZiPS DC playing time is updated daily, both pre-season and during the season, and the underlying performance projections are updated in the same manner as ZiPS (pre-season as necessary and daily during the season).
Steamer: Steamer Projections are run by Jared Cross, Peter Rosenbloom, and Dash Davidson and have been on FanGraphs since 2012. For members, we also have platoon projections, context-neutral projections, and percentile projections. They are all updated daily leading up to the season and during the season.
Steamboat600: These are exactly the same as Steamer projections, except each position player is prorated to 600 plate appearances (450 for catchers). Starting pitchers are prorated for 200 innings pitched, while relievers are prorated for 65 innings pitched. It is updated daily in the run-up to the season and during the season.
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THE BAT: THE BAT’s projections, run by Derek Carty, have been on FanGraphs since 2018. They are updated daily in the run-up to the season and during the season.
THE BAT X: THE BAT They are updated daily in the run-up to the season and during the season. You can read more about THE BAT X here.
OOPSY: OOPSY is run by Jordan Rosenblum and debuted on FanGraphs in 2025. Playtime for OOPSY is updated daily leading up to the season and during the season using RosterResource. The underlying performance forecasts are updated as necessary in the run-up to the season and during the season. You can read more about OOPSY here.
Composite projections
Composite projection systems are a collection of primary projection systems. These types of systems tend to perform better when tested against actual player performance.
FanGraphs depth charts: FanGraphs Depth Charts projections are a 50/50 mix of Steamer and ZiPS pro-rated to our RosterResource playtime projections. They are updated daily in the run-up to the season and during the season.
ATC: Compiled by Ariel Cohen and available on FanGraphs since 2017, ATC is a weighted composite of a number of projection systems based on their past performance. ATC is updated weekly in the run-up to the season. During the season it will be referred to as ATC DC and will use our RosterResource game time projections. ATC DC’s playing time is updated daily, while underlying performance forecasts are updated as necessary throughout the season. You can read more about ATC here.
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