The guide

It's baseball under black lights. The ball, bats, bases and uniforms glow, the rules are playful, and the crowd is part of the show. It began with the Tri-City Chili Peppers in 2024 and now tours Minor League ballparks. Read the history.

How a night runs

1. Pre-game party. Reported to start hours early, about 4:30 PM at one game. Stadium Journey
2. Daylight half. About an hour of regular-light baseball with the wacky rules. Prospect Times
3. Intermission. About 30 minutes while the stadium turns for night.
4. Cosmic half. The black lights come on for about an hour of glowing baseball. Early games used 18 lights; the tour now uses 100+. Visit Mesa

Generic night-baseball and glow photos, not from Cosmic games.

The Cosmic Baseball rules, as reported

There is no official rulebook we could find. These come from local coverage of real games, and rules vary by night, so expect surprises.

• Swingers only

  Bunting is an out. source

• Figure it out

  No mound visits. source

• Stay in the box

  Batters stay in the batter's box. source

• Backwards base paths

  For one inning the runners go the other way around. source

• Three minutes of chaos

  Fans help pick an inning and fan-drafted players join in. In Reno, foul balls stayed live and fans could throw balls back onto the field. source

• Ball four fungo

  A walk turns into a fungoed ball in play. source

• Coach challenge

  One challenge per team per half. source

• Home run derby

  A game in Indianapolis ended with derby rounds where each homer counted as a run. source

Fans at one game also reported pulling a giant Uno card to change a rule (Stadium Journey). The ball's glow can make spin hard to see (MLB.com).

What to wear

Black light makes white and neon fabrics glow, so wear bright. The team's own gear is UV-reactive (NBC4).

Watch it happen

Embedded from YouTube with credit to each creator. Nothing is hosted here.

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Quick answers

What is Cosmic Baseball?

Cosmic Baseball is baseball played under black lights, with UV-reactive uniforms, balls, bats and bases, so everything glows. It started in 2024 with the Tri-City Chili Peppers in Virginia and has grown into a national tour.

When is the 2027 Cosmic Baseball schedule?

The 2027 tour opens in Jacksonville, Florida on March 19-20 and runs to Wichita, Kansas on October 30, with 45 cities on the official lottery list. See the full schedule on the tour page.

How do I get Cosmic Baseball tickets?

Through a free ticket lottery on Cosmic's official site. Selected fans are notified by text and email and can buy until the night sells out.

How long is a Cosmic Baseball game?

In reports from two games: roughly one hour of daylight baseball, a 30-minute intermission, then about an hour under black lights. One report had the party starting around 4:30 PM and the game ending near 10:30 PM.

Who plays in Cosmic Baseball?

The two teams on tour are the Cosmic Chili Peppers and the Glow Mojis, made up of professional players, separate from the Chili Peppers' college summer league roster.

What are the rules?

They include no bunting, no mound visits and a fan-driven inning of chaos. There is no official published rulebook we could find, and rules vary by night.