UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No.     )*

USA TRUCK, INC.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

902925106

(CUSIP Number)

Stone House Capital Management, LLC

Attn: Mark Cohen

950 Third Avenue, 17th Floor

New York, NY 10022

(212) 543-1500

with a copy to:

Taylor H. Wilson, Esq.

Haynes and Boone, LLP

2323 Victory Avenue, Suite 700

Dallas, Texas 75219

(214) 651-5000

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

January 28, 2014

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.  x

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties to whom copies are to be sent.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934, as amended (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

Item 1. Security and the Issuer

This statement on Schedule 13D (this “Schedule 13D”) relates to shares of common stock (the “Common Stock”) of USA Truck, Inc., a Delaware corporation (the “Issuer”). The address of the principal executive office of the Issuer is located at 3200 Industrial Park Road, Van Buren, Arkansas 72956.

Item 2. Identity and Background

(a) This Schedule 13D is jointly filed by and on behalf of each of Stone House Capital Management, LLC, a Delaware limited liability company (“Stone House”); SH Capital Partners, L.P., a Delaware limited partnership (“Partners”); and Mark Cohen (“Mr. Cohen”). The Reporting Persons are filing this Schedule 13D jointly, and the agreement among the Reporting Persons to file jointly is attached hereto as Exhibit 99.1 and incorporated herein by reference (the “Joint Filing Agreement”). Partners is the record and direct beneficial owner of the securities covered by this statement. Stone House is the general partner of, and investment manager to, Partners. Mr. Cohen is the managing member of Stone House.

Each Reporting Person declares that neither the filing of this Schedule 13D nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) or 13(g) of the Act, the beneficial owner of any securities covered by this Schedule 13D.

(b) The address of the principal business office of each of the Reporting Persons is c/o Stone House Capital Management, LLC, 950 Third Avenue, 17^th Floor, New York, NY 10022.

(c) The principal business of Partners is acquiring, holding and selling securities for investment purposes. The principal business of Stone House is serving as the general partner of, and investment manager to, Partners. The present principal occupation of Mr. Cohen is serving as the managing member of Stone House.

(d) No Reporting Person has, during the last five years, been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

(e) No Reporting Person has, during the last five years, been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction as a result of which such Reporting Person was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

(f) The place of organization of each Reporting Person, other than Mr. Cohen, is listed in paragraph (a) of this Item 2. Mr. Cohen is a citizen of the United States of America.

Item 3. Source and Amount of Funds or other Consideration

The Reporting Persons expended an aggregate of approximately $19,574,167.08 (including commissions) to acquire 1,550,000 shares of Common Stock of the Issuer in various open market transactions. Funds used to acquire shares of Common Stock of the Issuer have come from general working capital of Partners.

Item 4. Purpose of Transaction

The Reporting Persons have acquired shares of Common Stock of the Issuer for investment purposes. The Reporting Persons intend from time to time to review their investment in the Issuer on the basis of various factors, including the Issuer’s business, financial condition, results of operations and prospects, general economic and industry conditions, the securities markets in general and those for shares of Common Stock of the Issuer in particular, as well as other developments and other investment opportunities. Based upon such review, the Reporting Persons will take such actions in the future as the Reporting Persons may deem appropriate in light of the circumstances existing from time to time, which may include further acquisitions of shares of Common Stock of the Issuer or disposal of some or all of the shares of Common Stock of the Issuer currently owned by the Reporting Persons or otherwise acquired by the Reporting Persons, either in the open market or in privately negotiated transactions.

In addition, the Reporting Persons may engage in communications with one or more shareholders, officers or directors of the Issuer, including discussions regarding the Issuer’s operations and strategic direction and ideas that, if effected, could result in, among other things: (a) the acquisition by the Reporting Persons of additional securities of the Issuer, or the disposition of securities of the Issuer; (b) an extraordinary corporate transaction, such as a merger, reorganization or liquidation, involving the Issuer or any of its subsidiaries; (c) a sale or transfer of a material amount of assets of the Issuer or any of its subsidiaries; (d) changes in the present board of directors or management of the Issuer; (e) a material change in the present capitalization or dividend policy of the Issuer; (f) any other material change in the Issuer’s business or corporate structure; (g) changes in the Issuer’s articles of incorporation, bylaws or instruments corresponding thereto or other actions which may impede the acquisition of control of the Issuer by any person; (h) causing any class of the Issuer’s securities to be delisted from a national securities exchange or to cease to be authorized to be quoted in an inter-dealer quotation system of a registered national securities association; (i) a class of equity securities of the Issuer becoming eligible for termination of registration pursuant to Section 12(g)(4) of the Act; or (j) any action similar to those enumerated above.

Except to the extent that the foregoing may be deemed to be a plan or proposal, none of the Reporting Persons currently has any plans or proposals that relate to or would result in any of the actions specified in clause (a) through (j) of Item 4 of Schedule 13D. The Reporting Persons reserve the right, based on all relevant factors and subject to applicable law, at any time and from time to time, to review or reconsider their position, change their purpose, take other actions (including actions that could involve one or more of the types of transactions or have one or more of the results described in paragraphs (a) through (j) of Item 4 of Schedule 13D) or formulate and implement plans or proposals with respect to any of the foregoing.

Item 5. Interest in Securities of the Issuer

(a) The aggregate number and percentage of the class of securities identified pursuant to Item 1 beneficially owned by each Reporting Person is stated in Items 11 and 13 on the cover page(s) hereto.

Each Reporting Person declares that neither the filing of this Schedule 13D nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) or 13(g) of the Act or any other purpose, the beneficial owner of any securities covered by this Schedule 13D.

Each Reporting Person may be deemed to be a member of a group with respect to the Issuer or securities of the Issuer for the purposes of Section 13(d) or 13(g) of the Act. Each Reporting Person declares that neither the filing of this Schedule 13D nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) or 13(g) of the Act or any other purpose, (i) acting (or has agreed or is agreeing to act) with any other person as a partnership, limited partnership, syndicate or other group for the purpose of acquiring, holding or disposing of securities of the Issuer or otherwise with respect to the Issuer or any securities of the Issuer or (ii) a member of any syndicate or group with respect to the Issuer or any securities of the Issuer.

(b) Number of shares as to which each Reporting Person has:

See Item 7 on the cover page(s) hereto.

See Item 8 on the cover page(s) hereto.

See Item 9 on the cover page(s) hereto.

See Item 10 on the cover page(s) hereto.

Partners is the record and direct beneficial owners of the securities covered by this Schedule 13D. Partners has the power to vote or to direct the vote of (and the power to dispose or direct the disposition of) the shares owned by it.

As general partner of Partners, Stone House may be deemed to have the shared power to vote or to direct the vote of (and the shared power to dispose or direct the disposition of) any shares of Common Stock of the Issuer beneficially owned by Partners. Stone House does not own any shares of Common Stock of the Issuer directly and disclaims beneficial ownership of any shares of Common Stock of the Issuer beneficially owned by Partners.

As the managing member of Stone House, Mr. Cohen may be deemed to have the shared power to vote or to direct the vote of (and the shared power to dispose or direct the disposition of) any shares of Common Stock of the Issuer beneficially owned by Stone House. Mr. Cohen does not own any shares of Common Stock of the Issuer directly and Mr. Cohen disclaims beneficial ownership of any shares of Common Stock of the Issuer beneficially owned by Stone House.

As of the date hereof, no Reporting Person owns any shares of Common Stock of the Issuer other than as set forth in this Item 5.

(c) Transactions in the class of securities reported on that were effected during the past sixty days or since the most recent filing of Schedule 13D, whichever is less, by the Reporting Persons are described below:

Item 6. Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer

Except as otherwise described herein and in the Joint Filing Agreement attached hereto as Exhibit 99.1, no Reporting Person has any contract, arrangement, understanding or relationship with any person with respect to the Common Stock of the Issuer or any other securities of the Issuer.

Item 7. Material to be Filed as Exhibits

The following exhibits are filed as exhibits hereto:

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

EXHIBIT INDEX

EXHIBIT 99.1

JOINT FILING AGREEMENT

January 28, 2014

Pursuant to and in accordance with the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and the rules and regulations thereunder, each party hereto hereby agrees to the joint filing, on behalf of each of them, of any filing required by such party under Section 13 or Section 16 of the Exchange Act or any rule or regulation thereunder (including any amendment, restatement, supplement, and/or exhibit thereto) with the Securities and Exchange Commission (and, if such security is registered on a national securities exchange, also with the exchange), and further agrees to the filing, furnishing, and/or incorporation by reference of this agreement as an exhibit thereto. This agreement shall remain in full force and effect until revoked by any party hereto in a signed writing provided to each other party hereto, and then only with respect to such revoking party.

IN WITNESS WHEREOF, each party hereto, being duly authorized, has caused this agreement to be executed and effective as of the date first written above.