QB · Free agent
The current Sleeper roster snapshot does not include an injury or practice designation for Ian Book.
Ian Book is a 28-year-old quarterback in FairPlay's bench tier at rank #330, with a value of 908. Ian Book has no matched NFL identity or 2026 weekly usage row. Check the identity join before treating missing data as missing participation. No usable weekly workload is available. The roster snapshot lists Active, which is an administrative status and not a promise of future volume.
Generated from FairPlay and nflverse data · Reviewed November 6, 2026 · Editorial policyFairPlay's above average market proxy (84) is above its mixed production input (66). This is a FairPlay input comparison, not a verified external ADP or market price. career window is at the top end; market proxy is the next strongest input. roster status is very low, which keeps the recommendation conditional.
Check the cross-source identity and roster record before interpreting the missing weekly match. Once identity is resolved, reassess this season's usable workload; do not treat an unmatched record as a measured zero.
The same player can require a different decision depending on your competitive window and the liquidity of the return.
A contender should keep or acquire Ian Book only when the available usage does not yet prove a weekly lineup edge and the roster still retains enough playable Superflex access. Do not pay the market-proxy premium without accepting the production gap.
A rebuilder should compare Ian Book's current liquidity with a future pick or younger position asset before deciding to hold. The the missing weekly match should determine the price floor; it does not forecast the next season.
FairPlay values Ian Book at 908. FairPlay's market proxy sits ahead of its production input by 18 points. Treat that as a model comparison, not a verified ADP or trade price.
Ian Book has no matched row in the 2026 nflverse weekly file. FairPlay does not turn that absence into zero usage or a role forecast.
The current nflverse weekly file contains no row for this player. FairPlay treats that absence as a limitation, not as zero usage.
FairPlay's above average market proxy (84) is above its mixed production input (66). This is a FairPlay input comparison, not a verified external ADP or market price.
FairPlay value 908 · Overall rank #330 · Market proxy 84 · Projected production input 66These are negotiation scenarios calibrated to the current FairPlay tier, not promises that every league will price the assets identically.
Ian Book: stash or drop decision
Because there is no matched NFL usage row, this is not a player-for-player trade quote. Keep the roster spot only if the upside case fits the roster and a more useful waiver or bench option is not available.
No trade quote proposed for Ian Book
FairPlay does not have verified external market pricing here. Use the calculator to compare the current model value with a roster-specific alternative, but do not treat this page as an outside-market quote.
Ian Book has no matched NFL identity or 2026 weekly usage row. Check the identity join before treating missing data as missing participation. FairPlay's strongest scored input is career window (94), while roster status is the main limitation. The usage record can test that read but cannot verify an external price or future outcome.
A confirmed NFL identity match for Ian Book, followed by a usable current-season row with attempt volume and passing efficiency, would resolve the two separate evidence gaps. Separately, a material roster status change or a different market-proxy/production-model gap would require a new FairPlay read.
Ian Book is age 28, with a career-window input score of 94/100 for QBs.
The search-rank proxy is 84/100. Production, opportunity and efficiency are projection-derived inputs, not measured NFL performance. Agreement among these inputs is not independent on-field confirmation.
These QB projection inputs combine prior information; they are not observed NFL percentiles. Current-season weekly records are shown separately and do not change the published production window.
Normalized model input scores, not probabilities. Projection-derived scores are estimates. They do not establish a measured NFL role, even when a separate current-season weekly record exists. The career-window and draft-capital scales are not empirical percentiles.
Career-window input is the strongest part of Ian Book’s current profile at 94/100. Draft-capital input is the clearest source of downside at 32/100. For trade decisions, compare that strength-and-risk mix with your roster timeline rather than relying on the overall value alone.
Comparable values to guide your offers.
Start with Ian Book in the dedicated Superflex calculator, then add the other side of the offer.