Pro Baseball Run in First Inning is a sports series on Kalshi, with markets like “1st inning: Over 0.5 runs”. The Kalshi Eye archive lists 94 of its markets and has 13 days of daily Parquet files from October 12, 2026 to October 24, 2026 (23 MB), with every order book change and trade.

Venue: Kalshi, series KXMLBRFI
Category: Sports
Markets: 94 (92 settled, 2 open)
Files: 13 days, October 12, 2026 to October 24, 2026, 23 MB, 1,984,290 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 Baseball Run in First Inning 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 KXMLBRFI trade on October 24, 2026, in DuckDB:

SELECT ts_recv, ticker, yes_price, size, taker_side
FROM 'kalshieye-data/trades/date=2026-10-24/series=KXMLBRFI/trades-KXMLBRFI-2026-10-24.parquet'
ORDER BY ts_recv;

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

Related Kalshi series

Pro Baseball Inning Win (KXMLBINNINGWIN): 404 markets, 13 days of files
Pro Baseball Inning Total (KXMLBINNINGTOTAL): 284 markets, 12 days of files
First Inning Run (KXNPBRFI): 92 markets, 9 days of files
KBO First Inning Run (KXKBORFI): 90 markets, 13 days of files
Pro Football First Touchdown (KXNFLFIRSTTD): 1,142 markets, 13 days of files
Pro Baseball Hits Runs RBIs (KXMLBHRR): 1,113 markets, 13 days of files

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