Pro Football Last Undefeated Team is a sports series on Kalshi, with markets like “Will San Francisco be the last undefeated team in the 2026-27 Pro Football regular season?”. The Kalshi Eye archive lists 32 of its markets and has 12 days of daily Parquet files from October 12, 2026 to October 23, 2026 (16 MB), with every order book change and trade.

Venue: Kalshi, series KXNFLLASTTOLOSE
Category: Sports
Markets: 32 (29 settled, 3 open)
Files: 12 days, October 12, 2026 to October 23, 2026, 16 MB, 1,327,436 rows
Datasets: Order book (L2, incremental), Order book snapshots (top 10, 1 second), Top of book (every change), Top of book (1-minute bars), Trades

Open Pro Football Last Undefeated Team in Markets to see every day and market, then export the days you need. Free sample files of each dataset are on the Kalshi data page.

Reading the files

Every KXNFLLASTTOLOSE trade on October 23, 2026, in DuckDB:

SELECT ts_recv, ticker, yes_price, size, taker_side
FROM 'kalshieye-data/trades/date=2026-10-23/series=KXNFLLASTTOLOSE/trades-KXNFLLASTTOLOSE-2026-10-23.parquet'
ORDER BY ts_recv;

To test a strategy on this series, see How to backtest Kalshi markets.

Related Kalshi series

ESoccer Game (KXESOCCERGAME): 18,378 markets, 12 days of files
Men's College Basketball AP Poll Top Rank (KXNCAAMBTOPAPRANK): 6,718 markets, 12 days of files
NHL Goalscorer (KXNHLGOAL): 6,078 markets, 12 days of files
College Football Spread (KXNCAAFSPREAD): 5,307 markets, 12 days of files
Pro Hockey Points (KXNHLPTS): 4,823 markets, 12 days of files
Pro Football Receiving Yards (KXNFLRECYDS): 4,479 markets, 12 days of files

Figures as of October 24, 2026. All Kalshi series with pages are listed on Kalshi series.