How old do you have to be to use Underdog?

Underdog requires users to be at least 18.

Is Underdog being sued?

7 cases we track name Underdog, including Underdog v. Tennessee (M.D. Tenn.); Underdog v. Connecticut (D. Conn.); Underdog v. Ohio (N.D. Ohio).

App · Availability checked Oct. 22, 2026

Is Underdog legal?

Underdog's Prediction Picks, traded on its own exchange and on partner exchanges. Underdog says Prediction Picks are available in every state and DC except Arizona, Michigan, Nevada and New York. US territories and Ontario are excluded. Eligibility depends on physical location at the time of trading. Underdog does not publish a separate sports-only restriction list. Its help centre also names 14 states where Prediction Picks are offered but Pick'em and Drafts are not. By its own list, it offers contracts in 47 of 51 jurisdictions and not in Arizona, Michigan, Nevada, New York.

Cite this page

Bluebook

Is Underdog Legal? States, Lawsuits and Regulation, Prediction Market Laws (last updated Oct. 22, 2026), https://predictionmarketlaws.com/platforms/underdog.

APA

Prediction Market Laws. (2026, October 22). Is Underdog Legal? States, Lawsuits and Regulation. https://predictionmarketlaws.com/platforms/underdog

Where Underdog says it operates

Hover or tab through the map for each state.

Offered 47
Not offered 4

Source: Underdog help centre: Eligible States for Prediction Picks (dated 2026-09-10), checked Oct. 22, 2026.

State enforcement naming Underdog

Oct. 9, 2026
Tennessee: Cease-and-desist
The Council's director of fantasy sports told Underdog to halt its prediction market operations in Tennessee, warning of penalties, referral to law enforcement and possible revocation of its affiliate's fantasy sports license.
Source: Covers
Oct. 2, 2026
Ohio: Cease-and-desist
The OCCC sent cease-and-desist letters to ten firms offering sports event contracts: Polymarket, Novig, Underdog, Coinbase, ProphetX, Robinhood, Gemini Titan, Webull, Plus500US and Moomoo. Recipients were told to confirm compliance in writing by October 16. Kalshi, already in litigation with the state, was not a recipient.
Source: SBC Americas
Sept. 16, 2026
Missouri: Cease-and-desist
The attorney general demanded each operator stop offering sports contracts to people in Missouri, or obtain a Gaming Commission license, pay the 10% wagering tax and fees, and bar under-21 users, within 30 days; the letters were announced Sept. 18, 2026.
Source: Missouri Attorney General letter to KalshiEX LLC
Sept. 10, 2026
Connecticut: Cease-and-desist
DCP ordered nine platforms (including ProphetX) to stop offering sports event contracts and issued about 30 subpoenas to vendors, payment firms, app stores and media outlets.
Source: Office of Gov. Ned Lamont press release

Lawsuits naming Underdog

Operator v. state 7

Underdog Exchange DCM, Inc. v. SkrmettiU.S. District Court for the Middle District of Tennessee, 3:26-cv-01461Pending
Underdog Exchange DCM, Inc. v. TongU.S. District Court for the District of Connecticut, 3:26-cv-01499Pending
Underdog Exchange DCM, Inc. v. WilsonU.S. District Court for the Northern District of Ohio, 1:26-cv-02169Pending
Underdog Exchange DCM, Inc. v. BrownU.S. District Court for the Western District of Washington, 2:26-cv-03200Pending
Underdog Exchange DCM, Inc. v. CampbellU.S. District Court for the District of Massachusetts, 1:26-cv-14098Pending
Underdog Exchange DCM, Inc. v. KaulU.S. District Court for the Western District of Wisconsin, 3:26-cv-00858Pending
Underdog Exchange DCM, Inc. v. TorrezU.S. District Court for the District of New Mexico, 1:26-cv-02935Pending

Underdog, state by state

State	Underdog	State status	Actions naming Underdog
Alabama	Offered	No public action found	None
Alaska	Offered	No public action found	None
Arizona	Not offered	In litigation	1
Arkansas	Offered	No public action found	None
California	Offered	No public action found	None
Colorado	Offered	No public action found	None
Connecticut	Offered	In litigation	2
Delaware	Offered	No public action found	None
District of Columbia	Offered	No public action found	None
Florida	Offered	No public action found	None
Georgia	Offered	No public action found	None
Hawaii	Offered	No public action found	None
Idaho	Offered	No public action found	None
Illinois	Offered	In litigation	None
Indiana	Offered	No public action found	None
Iowa	Offered	In litigation	None
Kansas	Offered	No public action found	None
Kentucky	Offered	In litigation	None
Louisiana	Offered	No public action found	None
Maine	Offered	No public action found	None
Maryland	Offered	In litigation	None
Massachusetts	Offered	In litigation	1
Michigan	Not offered	Court order in force	None
Minnesota	Offered	In litigation	None
Mississippi	Offered	No public action found	None
Missouri	Offered	In litigation	1
Montana	Offered	Enforcement, no lawsuit	None
Nebraska	Offered	No public action found	None
Nevada	Not offered	Court order in force	None
New Hampshire	Offered	No public action found	None
New Jersey	Offered	In litigation	None
New Mexico	Offered	In litigation	1
New York	Not offered	In litigation	None
North Carolina	Offered	Law enacted	None
North Dakota	Offered	No public action found	None
Ohio	OfferedUnderdog's eligible-states page names Ohio, and CT, HI, ID, IA, LA, ME, MD, MA, MT, MS, NJ, PA and WA, as states where users can use Prediction Picks but not Pick'em or Drafts.	In litigation	2
Oklahoma	Offered	No public action found	None
Oregon	Offered	No public action found	None
Pennsylvania	Offered	No public action found	None
Rhode Island	Offered	In litigation	None
South Carolina	Offered	No public action found	None
South Dakota	Offered	No public action found	None
Tennessee	Offered	In litigation	2
Texas	Offered	No public action found	None
Utah	Offered	In litigation	None
Vermont	Offered	No public action found	None
Virginia	Offered	No public action found	None
Washington	Offered	Court order in force	1
West Virginia	Offered	No public action found	None
Wisconsin	Offered	In litigation	1
Wyoming	Offered	No public action found	None

Questions people ask

Is Underdog legal?: UDM, LLC d/b/a Underdog Predict is a CFTC-registered futures commission merchant and NFA member. Underdog also owns a DCM/DCO, 'Aristotle Exchange DCM/DCO, Inc. d/b/a Underdog Exchange' (UDX), which the CFTC's DCM list still shows as 'Aristotle Exchange DCM, Inc.' (designated 2025-09-05). Markets may also come from Kalshi or Nadex. Underdog's help centre calls Prediction Picks financial instruments traded through a regulated exchange. Underdog says Prediction Picks are available in every state and DC except Arizona, Michigan, Nevada and New York. US territories and Ontario are excluded. Eligibility depends on physical location at the time of trading. Underdog does not publish a separate sports-only restriction list. Its help centre also names 14 states where Prediction Picks are offered but Pick'em and Drafts are not. By its own list, it offers contracts in 47 of 51 jurisdictions and not in Arizona, Michigan, Nevada, New York. Several states argue its sports contracts are illegal gambling, and federal appeals courts have split on whether federal law overrides them.
In which states is Underdog not available?: Not offered: Arizona, Michigan, Nevada, New York. Source: Underdog help centre: Eligible States for Prediction Picks (dated 2026-09-10), checked Oct. 22, 2026.
How old do you have to be to use Underdog?: Underdog requires users to be at least 18.
Is Underdog being sued?: 7 cases we track name Underdog, including Underdog v. Tennessee (M.D. Tenn.); Underdog v. Connecticut (D. Conn.); Underdog v. Ohio (N.D. Ohio).

Sources

What we couldn't confirm: No Underdog statement on tax forms (e.g. 1099-B) for Prediction Picks was found. The help centre's 'Account, Funds & Taxes' article does not mention taxes, and the Futures Account Agreement PDF could not be read. Whether any states get Prediction Picks without sports, or with only some sports, was not found. Underdog publishes only the eligible and ineligible lists. DeFi Rate reports 19+ in Alabama and Nebraska and 21+ in some states, but Underdog's eligibility page says 18 or older with no state exceptions. The stricter ages were not confirmed. No Underdog statement tying Prediction Picks availability to where Underdog holds a sportsbook licence was found. At launch (September 2025), Underdog said it would prioritise states where legal sports betting had not been adopted. Whether Underdog still uses Crypto.com's CDNA beyond the 'Nadex' rules it cites, and what share of markets runs on UDX, was not confirmed. Any non-sports categories were not confirmed on Underdog's own pages. LSR mentions non-sports categories, but Underdog's help pages describe only sports outcomes.

What it is: Offered as 'Prediction Picks' inside the Underdog app, through UDM, LLC d/b/a Underdog Predict, a CFTC-registered FCM. Underdog says each market comes from one of several regulated exchanges (its own UDX, Kalshi or Nadex), chosen by Underdog.
Operated by: UDM, LLC d/b/a Underdog Predict
Contracts trade on: Underdog's own exchange UDX (Aristotle Exchange DCM/DCO, Inc. d/b/a Underdog Exchange), plus Kalshi and Nadex (Crypto.com | Derivatives North America)
Regulation: UDM, LLC d/b/a Underdog Predict is a CFTC-registered futures commission merchant and NFA member. Underdog also owns a DCM/DCO, 'Aristotle Exchange DCM/DCO, Inc. d/b/a Underdog Exchange' (UDX), which the CFTC's DCM list still shows as 'Aristotle Exchange DCM, Inc.' (designated 2025-09-05). Markets may also come from Kalshi or Nadex. Underdog's help centre calls Prediction Picks financial instruments traded through a regulated exchange.
Launched: Underdog's sports predictions were live in 16 states by September 2, 2025, through a partnership with Crypto.com Derivatives North America. Underdog's own exchange, UDX, went live on July 17, 2026.
Minimum age: 18
Contract categories: Sports
Availability checked: Oct. 22, 2026

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