22% — Will Lane Johnson announce his retirement before the 2029-30 NFL season Kalshi 22% · 6 contracts · $0 volume · medium confidence Updated 2026-09-21 12:59:56 UTC Why this matters: This contract estimates a 22% probability that Lane Johnson will announce his retirement before the start of the 2029-30 NFL season, meaning within approximately 3 years. Johnson, the Philadelphia Eagles' right tackle, is currently 36 years old and would be 39 at that deadline. The probability reflects uncertainty about whether age-related decline, injury, or personal choice will lead him to exit the league during this window. Key drivers include his injury history—he has dealt with shoulder and other durability concerns throughout his career—and whether the Eagles maintain a competitive roster that keeps him motivated to continue playing. The most concrete resolution point will come when Johnson either officially announces a retirement decision or plays through the 2029-30 season, eliminating the possibility. Market pricing at 22% suggests forecasters view retirement as somewhat unlikely but not remote, consistent with many elite offensive linemen playing into their late 30s. Key factors: - Johnson's age (36 currently) and typical career trajectory for elite offensive linemen relative to the 2029-30 deadline - His documented injury history, particularly shoulder issues, and whether new injuries occur between now and late 2029 - The Eagles' competitive window and roster construction decisions that might influence his motivation to continue - Contract terms and financial incentives that would either encourage or discourage retirement during this period - Comparable retirement timing for similar-era elite tackles and whether Johnson has made public statements about his playing timeline Contracts: - Will Matthew Stafford announce his retirement before the 2027-28 NFL season?: Before the 2027-28 season — 14¢ Kalshi $0 (weight 17%) - Will Lane Johnson announce his retirement before the 2029-30 NFL season?: Before the 2029-30 season — 4¢ Kalshi $0 (weight 17%) - Will Joe Flacco announce his retirement before the 2028-29 NFL season?: Before the 2028-29 season — 63¢ Kalshi $0 (weight 17%) - Will Derrick Henry announce his retirement before the 2027-28 NFL season?: Before the 2027-28 season — 9¢ Kalshi $0 (weight 17%) - Will Derrick Henry announce his retirement before the 2028-29 NFL season?: Before the 2028-29 season — 25¢ Kalshi $0 (weight 17%) - Will Davante Adams announce his retirement before the 2027-28 NFL season?: Before the 2027-28 season — 14¢ Kalshi $0 (weight 17%) --- ## Methodology SimpleFunctions aggregates live YES-side prices from Kalshi and Polymarket contracts bound to this question. For binary topics the headline is the liquidity-weighted mid-price (weight = log(1 + 24h volume) × freshness, where freshness is 1.0 if updated <24h, 0.7 if <7d, 0.4 otherwise). For multi-outcome (winner-take-all) topics the headline is the current leader's price — disjoint outcomes are never arithmetically averaged. Snapshots refresh every 5 minutes during market hours. ## SF Signal - SF Index, regime, and 30d Brier calibration are computed separately and surfaced at https://simplefunctions.dev/admin/calibration. - No SimpleFunctions index / regime / calibration signal is bound to this topic yet — the headline above is market-derived only. --- *Last verified: 2026-09-21T11:20:55.111Z* By SimpleFunctions — https://simplefunctions.dev/ Cite as: "22% per prediction markets (SimpleFunctions, September 2026)" Canonical: https://simplefunctions.dev/answer/nflretire Full data: https://simplefunctions.dev/api/public/query?q=Will%20Lane%20Johnson%20announce%20his%20retirement%20before%20the%202029-30%20NFL%20season Provider: SimpleFunctions — https://simplefunctions.dev