In a recent, high-profile ruling, a federal court finally recognized that a substantial delay in executing a death row inmate violated the Eighth Amendment’s ban on cruel and unusual punishments. Courts have repeatedly rejected these so-called “Lackey claims,” making the federal court’s decision in Jones v. Chappell all the more important. And yet it was deeply flawed. This paper focuses on one of the major flaws in the Jones decision that largely escaped attention: the application of the non-retroactivity rule from Teague v. Lane. By comprehensively addressing the merits of the Teague bar as applied to Lackey claims, and making the case for applying the bar, this paper adds to, and challenges, the existing literature on capital punishment, Lackey claims, and Teague doctrine. This paper dissects the Jones ruling on the application of Teague, examining the Supreme Court’s “new rule” case law and concluding that Lackey claims, when viewed at the appropriate level of generality, propose a new rule. It then addresses the more complicated aspect of applying Teague in this context, recognizing that the first Teague exception poses the most likely basis for avoiding the Teague bar on a Lackey claim. At a minimum, Lackey claims (like Miller v. Alabama claims, now the subject of substantial Eighth Amendment litigation on collateral review) sit at the intersection of procedural and substantive rules. Nonetheless, this paper makes the case for viewing the claim as procedural and therefore Teague-barred. Ultimately, then, this paper emphasizes a point that could substantially influence existing litigation: litigators and federal judges should take the Teague bar more seriously when considering Lackey claims on federal habeas review, particularly when viewed in light of modern habeas rules and doctrine that limit relief and protect the interests of the states. But the paper also emphasizes an important point about death penalty policy and politics: if the state is to have a death penalty at all, it should be prepared, and willing, to ensure that death sentences are actually carried out