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About MSBL/MABL

From one Little League dads' game on Long Island to 45,000 players across the country — the league that gave grown men their game back. Celebrating 39 years in 2026.

Est. 1988

One ad in the paper started it all

In 1985, Steve Sigler was coaching his sons' Long Island Little League team when he organized a game for the dads. That single game, he says, "ignited the spark to play baseball again." But he couldn't find an organized adult league anywhere — so he placed a small ad in the local newspaper looking for guys his age who wanted to play. The response was enough to form four teams in 1986.

In 1988, Sigler formally founded the Men's Senior Baseball League, running it out of his Long Island home to give adults a real way back into the game — full nine innings, wood bats, official rules. It struck a nerve. Word spread, leagues formed, and Sigler established the MSBL/MABL World Series and the Fall Classic, giving local teams a national stage.

Today MSBL/MABL is the premier amateur baseball league for adults 18 and older and the fastest-growing adult baseball organization in the country — with leagues not just across the United States but in Puerto Rico, the Netherlands, and Australia.

MSBL National — Men's Senior Baseball League logo
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Milestones

How the league grew

1985

The Spark

Steve Sigler organizes a baseball game for the fathers on his sons' Long Island Little League team. The itch to play returns.

1986

Four Teams

A small newspaper ad draws enough players to form four teams — the seed of what becomes the Men's Senior Baseball League.

1988

MSBL Is Founded

Sigler formally founds the MSBL, running it from his Long Island home for adults eager to get back in the game.

1990s

Going National

The MSBL/MABL World Series launches in Arizona on MLB Spring Training fields, soon joined by the Fall Classic in Florida. Over 30 regional tournaments follow in leagues nationwide.

1998

Giving Back

MSBL begins its national charitable effort — over $300,000 donated to good causes in the years since, most recently through the Tunnel to Towers Foundation.

2026

39 Years Strong

325 affiliates, 3,200+ teams, and 45,000+ members in leagues across the US, Puerto Rico, the Netherlands, and Australia — the largest and fastest-growing adult baseball organization in the nation.

Benefits of Membership

Why players choose MSBL

MSBL/MABL offers far more than just games — it's a full baseball experience with competitive structure, national opportunity, and a community built to last.

Real Baseball

Full nine innings, real rules, real competition. No slow-pitch, no softball — hardball the way it was meant to be played.

Built-In Community

Teams and friendships that last decades. Players come back year after year — not just for the game, but for the people.

National Stage

Local league players can qualify and compete in the World Series and Fall Classic — on the same fields where MLB Spring Training happens.

Age Division Parity

Divisions from 18+ to 80+ mean you're always competing against your peers — fair, competitive, and meaningful at every age.

Safety & Structure

Sanctioned games, umpired by trained officials. MSBL enforces rules designed to keep the game safe and competitive for adult athletes.

Giving Back

MSBL leagues have contributed over $300,000 to charitable causes, including the Tunnel to Towers Foundation supporting first responders and military families.

Where Can I Find MSBL?

Leagues in every major market

With over 325 local affiliates across the country and beyond, there is almost certainly an MSBL league near you. We span every major US market and have taken the game international.

US markets include: Atlanta · Boston · Chicago · Dallas · Denver · Houston · Los Angeles · New York · St. Louis · San Francisco · Washington DC — and hundreds of other cities, towns, and regions coast to coast.

Atlanta Boston Chicago Dallas Denver Houston Los Angeles New York St. Louis San Francisco Washington DC Puerto Rico Netherlands Australia
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Cost to Play

Affordable baseball for real people

Playing in an MSBL league is more affordable than most people expect. In most leagues across the US, a full team can field a season for less than $15 per player per game — a small price for a full nine-inning game on a real diamond with umpires and official scorekeeping.

Typical MSBL seasons run approximately 20 regular-season games plus playoffs. Teams pay registration fees to their local affiliate league, which covers field rental, umpires, balls, and administration. Individual players split costs with their team.

Ready to find out what it costs in your area? Contact your nearest MSBL affiliate or start the conversation with us.

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<$15
Per player / per game
~20
Regular-season games
650+
Teams at nationals
Media Attention

The press has taken notice

MSBL's growth hasn't gone unnoticed. The league has generated over 600 local media accounts across the country, plus national coverage in some of America's most recognizable outlets.

Sports Illustrated
USA Today
National Broadcast TV
600+ Local Outlets

The story of grown men reclaiming the game they love — competing seriously, building friendships, and playing the game the right way well into their 70s and 80s — has proven irresistible to journalists and broadcasters across the country.

MSBL team uniform partners — custom baseball uniforms for your team

Learn about MSBL's official uniform partners →

Charitable Partner

Supporting the Tunnel to Towers Foundation

MSBL leagues across the country contribute to the Tunnel to Towers Foundation, which provides mortgage-free homes to Gold Star and fallen first responder families, and builds specially adapted homes for catastrophically injured veterans and first responders.

The 2025 Tunnel to Towers contributions represent the continued commitment of MSBL leagues to give back to the communities they play in. Over the life of the organization, MSBL has donated more than $300,000 to charitable causes.

Learn About Tunnel to Towers
MSBL's Future

Still growing after 39 years

MSBL continues to expand — new affiliates, new divisions, new regions. The mission hasn't changed: give every adult, at every age, a real and lasting way to keep playing the game they love. There's never been a better time to get in the game.

Keep Baseball Alive

Give every adult, at every age, a real and lasting way to keep playing the game they love.

Build Community

Create teams and friendships that last decades, on and off the diamond — and give back to the communities we play in.

Honor the Game

Play the real version — wood bats, full innings, official rules — with integrity and pride. Don't go soft, play hardball.

"I never dreamed it would get to where it is today, but I am so gratified at the mark it has left on tens of thousands of players across the country."

Steve Sigler — Founder & President, MSBL

At 76, still playing — including a recent Father/Son tournament with his son and grandson.

Contact MSBL

Send a Message

Stay Social with MSBL

Follow us for game highlights, tournament news, and stories from leagues across the country.

Facebook — @adultbaseball Instagram — @msblnational X (Twitter) — @MSBL_National
Be Part of the Story

The next chapter is yours

Join a league, start one, or bring a team to a national tournament. However you play, you belong here.

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