OPINION

William Rawls, an inmate at the State Correctional Institution at Somerset, Pennsylvania, appeals the order of the United States District Court for the East *464 ern District of Pennsylvania denying his motion for a preliminary injunction. Because the appeal does not present a substantial question, we will summarily affirm. See 3d Cir. LAR 27.4; 3d Cir. I.O.P. 10.6.

I.

As we write primarily for the parties, who are familiar with the facts and procedural history of this case, we only briefly discuss the events leading to this appeal. In August 2008 — a few months after commencing this prisoner civil rights action— Rawls filed a motion for a preliminary injunction. He claimed, inter alia, that Appellees had conducted “an arbitrary [technical parole violation] re-parole review,” had yet to return his previously confiscated legal documents, were tampering with his mail, and were withholding his medical records and not providing treatment for his medical conditions. Rawls sought an order (1) “granting [him] protection” under 18 U.S.C. § 3771 and 61 Pa. Stat. § 331; 1 (2) authorizing “an impartial Federal investigation into the abuse allegations [he] asserts in his complaints”; and (3) restraining Appellees from “retaining [his] legal property, mail tampering, hindering [his] liberal public/community placement to attain any warranted medical care including therapeutic diet and exercise, and hindering legitimate liberal access to judiciary authorities of any kind, ... embezzling [his] funds and assets, and deviating from any lawfully just practice(s).”

In February 2009, the District Court denied Rawls’ motion, holding that his “legally and factually unintelligible filings” failed to satisfy the requirements for obtaining a preliminary injunction. Rawls now appeals the District Court’s order to this Court.

II.

We have jurisdiction over this appeal pursuant to 28 U.S.C. § 1292(a)(1), and “review the denial of a preliminary injunction for an abuse of discretion, an error of law, or a clear mistake in the consideration of proof.” Kos Pharms., Inc. v. Andrx Corp., 369 F.3d 700, 708 (3d Cir. 2004) (internal quotations omitted).

To obtain the “extraordinary remedy” of a preliminary injunction, the moving party must establish: “(1) a likelihood of success on the merits; (2) that [he] will suffer irreparable harm if the injunction is denied; (3) that granting preliminary relief will not result in even greater harm to the nonmoving party; and (4) that the public interest favors such relief.” Id. The District Court did not err in concluding that Rawls failed to make this showing, for he did not submit evidence substantiating his claims. 2 See Opticians Ass’n of Am. v. Indep. Opticians of Am., 920 F.2d 187, 192 (3d Cir. 1990) (stating that a preliminary injunction should issue “[o]nly if the mov-ant produces evidence sufficient to convince the trial judge that all four factors favor preliminary relief’). Accordingly, *465 we will summarily affirm the District Court’s denial of Rawls’ motion for a preliminary injunction. To the extent Rawls’ “Leave to File Certificate of Appealability as of [sic] Matter of Law” moves for appointment of counsel or raises additional requests for relief, those requests are denied.