r/mlb vs r/baseball

Side-by-side using public descriptions, members, growth and rule titles from SubMouse. Missing fields show as n/a. Adult communities are excluded.

Swap sides New comparison Related to r/mlb Related to r/baseball

MLB room vs baseball room

r/mlb’s public description is Reddit’s MLB community for discussions, news and highlights from all thirty teams. r/baseball calls itself a home for America’s pastime—mainly MLB, but other leagues and levels are welcome.

In our directory, baseball is larger (about 3.2M, rank #323) than mlb (about 3.1M, rank #339). Activity samples show baseball posting more often (~136 posts/day vs ~35). mlb’s sample is mix of text with image and link; baseball’s is mix of text with link and video. mlb flairs include Discussion, News, History, Image, Opinion; baseball shows News, Image, Opinion, Video, Analysis. Our directory lists each name among the other’s related communities.

Rule titles: mlb requires MLB-related posts and limits politics/religion and self-promo; baseball emphasizes high-quality titles, news, highlights and performance posts. Pattern matches nba-vs-basketball elsewhere on SubMouse.

Choose r/mlb for Major League–only news and discussion under its MLB-related rule.
Choose r/baseball for broader baseball coverage and higher-volume daily threads under its quality-title rules.
Sizes are close; baseball posts far more often in our sample. nba-vs-basketball is a related league-vs-sport pattern.

Written comparison based on public descriptions and rule titles · updated 2026-11-07.

r/mlb

Major League Baseball

Subreddit for Major League Baseball. Reddit’s MLB Community. From discussions, news, and highlights from all thirty teams.

Members: 3.1M
7-day growth: +1.5K
Posts/day: 34.6
Directory rank: #339
Created: Jan 20, 2009
Submissions: Text or links

Sample mix: text posts 36%, images 34%, links 16%

Topics: Baseball

Rule titles (short names we collected)

Follow all Reddiquette
All posts must be Major League Baseball-related
Be Nice
Broadcasting / Streaming
High Quality Content
Politics / Religion
Self Promotion
Report & Modmail

Open r/mlb on SubMouse

r/baseball

America's Pastime

The BEST subreddit for America's pastime: baseball. The focus is mainly on MLB, but posts about other leagues and levels are welcome! Official r/baseball Discord: https://discord.gg/rbaseball Mike Trout For the best use…

Members: 3.2M
7-day growth: +3.6K
Posts/day: 136.3
Directory rank: #323
Created: Sep 7, 2008
Submissions: Text or links

Sample mix: text posts 36%, links 23%, videos 17%

Topics: Baseball, USA

Rule titles (short names we collected)

Be Civil to Others
Create High-Quality Content
Post with Clear and Satisfactory Titles
Create High-Quality Breaking News Posts
Create High-Quality Twitter/X.com Posts
Create High-Quality Video Highlights
Create High-Quality Game Performance Posts
Do Not Spam
Do Not Use r/baseball to Advertise
Create High-Quality Post-Series Threads
Create Accurate Elimination/Clinching Posts
Follow Paywall Guidelines

Open r/baseball on SubMouse

Supported differences

Aspect	r/mlb	r/baseball
Public focus (from each community’s public description)	Subreddit for Major League Baseball. Reddit’s MLB Community. From discussions, news, and highlights from all thirty teams.	The BEST subreddit for America's pastime: baseball. The focus is mainly on MLB, but posts about other leagues and levels are welcome! Official r/baseball Discord: https://discord.gg/rbaseball Mike Trout For the best use…
Size r/baseball is larger in our directory.	3.1M members	3.2M members
Posting activity (our sample)	34.6/day	136.3/day
Common post types in our sample	text posts 36%, images 34%, links 16%	text posts 36%, links 23%, videos 17%
Topic tags on SubMouse	Baseball	Baseball, USA
Selected rule titles (short names we collected)	Follow all Reddiquette; All posts must be Major League Baseball-related; Be Nice; Broadcasting / Streaming; High Quality Content	Be Civil to Others; Create High-Quality Content; Post with Clear and Satisfactory Titles; Create High-Quality Breaking News Posts; Create High-Quality Twitter/X.com Posts

What they share

Shared SubMouse topics: Baseball
Our directory lists each of these communities on the other’s related list.

Rules and posting patterns we can verify

mlb short titles include: Follow all Reddiquette; All posts must be Major League Baseball-related; Be Nice; Broadcasting / Streaming; High Quality Content; Politics / Religion; Self Promotion; Report & Modmail. Our sample mixes text, images and links with discussion and news flairs.

baseball: Be Civil to Others; Create High-Quality Content; Post with Clear and Satisfactory Titles; Create High-Quality Breaking News Posts; Create High-Quality Twitter/X.com Posts; Create High-Quality Video Highlights; Create High-Quality Game Performance Posts; Do Not Spam. Our sample is busier across text, links, video and images with news, opinion and analysis flairs.

Where this comparison comes from

Public descriptions and member counts from SubMouse’s safe-for-work directory. Short rule titles and activity samples SubMouse collected. Short titles only. Related curated page: nba-vs-basketball.

Members and public descriptions come from SubMouse's safe-for-work directory (as of 2026-11-02 UTC); 7-day growth measured from 2026-10-26. Posts/day and post-type mixes appear when we have an activity sample. Rule lines are short titles, not the full sidebar. Directory rank is listing order — communities outside the current Top 100 open in the info tool instead of a full community page.