Following a bench trial, Larry Williams was convicted of distributing crack cocaine and was ordered to serve a prison term of 252 months. Williams appeals, contending that the district court erred in accepting his jury waiver without taking steps to ensure that the waiver was knowing and intelligent. Because Williams did not raise this issue below, our review is confined to one for plain error, and the record does not support a finding that his substantial rights were affected by any error in accepting his waiver. We therefore affirm Williams’ conviction.
I.
A one-count indictment charged that Williams knowingly and intentionally dis *608 tributed more than fifty grams of cocaine base in the form of crack cocaine, in violation of 21 U.S.C. § 841(a)(1). R. 5. The basis for the charge was Williams’ sale of approximately fifty-eight grams of crack cocaine to an undercover agent of the Bureau of Alcohol, Tobacco and Firearms and a cooperating individual. The sale took place on October 30, 2003. Williams was arrested more than a year later, on November 4, 2004, and was indicted on November 30, 2004. He was arraigned on December 7, 2004, and entered a plea of not guilty. A series of status conferences and continuances ensued. The Federal Defender was appointed to represent Williams on May 19, 2006, after his previously-appointed counsel withdrew.
On November 30, 2006, when the parties’ counsel appeared before the court for another status hearing, Williams’ attorney announced that Williams, who was not present, wanted a bench trial:
Mr. Rodriguez: Good morning, your Honor. Sergio Rodriguez from the Federal Defender Program on behalf of Larry Williams. He was not brought over, but I was in contact with him. Your Honor, we are here to get a trial date finally. We are going to ask that this Court consider a bench trial. It should only be a couple of days long.
The Court: How long will it take?
Mr. Rodriguez: It is only going to be a couple of days.
Mr. Gurland: It should be quick.
[Assistant U.S. Attorney]
The Court: And you have consented?
Mr. Gurland: I have no objection to a bench trial.
Mr. Rodriguez: He is smiling, Judge.
The Court: Well, you actually have to consent.
Mr. Gurland: I consent.
The Court: I know that is painful.
R. 100 at 2-3. The court set the matter down for a bench trial on March 5, 2007.
The record of that hearing manifests compliance with the second and third of the conditions set forth in Federal Rule of Criminal Procedure 23(a) for a bench trial — consent by government and consent by the court — but not the first — a written waiver by the defendant of his right to a jury trial. The record contains no such written waiver, and neither party maintains that the defendant ever executed such a waiver.
Subsequent to this hearing, Williams’ counsel filed a motion seeking leave to withdraw from representing Williams and to continue the trial date based on a breakdown of the attorney-client relationship. In that motion, Williams’ attorney noted that “Mr. Williams still wishes to have a bench trial and would like one as soon as possible, but would like to have some time to prepare with new counsel.” R. 58 at 2 ¶ 4. The court granted counsel’s request to withdraw and a new attorney was appointed in his stead, but the scheduled trial date remained in place.
When the parties appeared for trial as scheduled on March 5, the court took the opportunity at the outset to confirm that Williams indeed wished to waive his right to a jury trial in favor of a bench trial. “I just want to make sure that you know you do have a right to a jury trial,” Judge Andersen told Williams. R. 77-1 at 3. “And would you like to have a bench trial and waive the jury trial?” Id. “Yes, sir,” Williams replied. Id. The trial commenced and concluded on the following day, when Judge Andersen found Williams guilty. The judge later ordered him to serve a prison term of 252 months.
Although the court confirmed with Williams at the start of the trial that he wished to waive his right to a jury trial, the court did not comply with the supervi
*609
sory rule we adopted in
United States v. Scott,
At no time in the proceedings below, however, did Williams or his counsel ever raise these omissions. Neither during nor after the trial did Williams object to the trial or to the judge’s verdict on the ground that his waiver of the jury was uninformed and therefore invalid.
It is only on appeal that Williams argues that he did not knowingly and intelligently waive his right to trial by a jury. In the absence of a Delgado colloquy and other record evidence establishing his comprehension of the nature of right he was waiving, Williams contends that his jury waiver was invalid and that we must vacate his conviction and remand for a new trial. Alternatively, he asks that we remand for an evidentiary hearing as to whether his jury waiver was knowing and intelligent.
II.
The Sixth Amendment right to a trial by a jury in a criminal case is considered “fundamental to the American scheme of justice,”
Duncan v. Louisiana,
Rule 23(a) provides that “[i]f the defendant is entitled to a jury trial, the trial must be by jury unless: (1) the defendant waives a jury trial in writing; (2) the government consents; and (3) the court approves.” Fed.R.Crim.P. 23(a). The rule reflects the Supreme Court’s decision in
Patton,
Compliance with Rule 23(a) does not by itself establish that the defendant’s waiver was informed, and it is for that reason that in
Scott
we instructed district courts to engage the defendant in a colloquy, later outlined in
Delgado,
designed to ensure that the defendant understands what he is giving up when he waives his right to a jury.
See Brady,
However, neither a
Delgado
colloquy nor a written waiver is a constitutional mandate.
See United States v. Rodriguez,
Here we have a record throwing little if any light on Williams’ understanding of the right he waived. (Williams does not argue that his waiver was involuntary, and given that the district judge personally addressed him and confirmed his wish to waive a jury trial, we have no reason to question the voluntariness of the waiver.) Because Williams never raised this issue below, no evidence was elicited as to the circumstances underlying his waiver and the district court never made a finding as to whether it was knowing and intelligent. The lack of a written waiver by Williams was a violation of Rule 23(a), and the failure to conduct a
Delgado
colloquy was contrary to the supervisory rule we
*611
adopted in
Scott.
But these errors do not call for reversal unless they affected Williams’ substantial rights. 28 U.S.C. § 2111; Fed.R.Crim.P. 52;
Rodriguez,
We take our cue in how to assess the validity of Williams’ waiver from two Supreme Court decisions dealing with guilty pleas given by defendants who were not fully apprised of their trial rights before waiving those rights:
Vonn,
Vonn
holds that where a defendant challenges the validity of his guilty plea based on an error in the trial court’s plea colloquy that he did not bring to the trial judge’s attention, he bears the burden of showing that the defect constitutes plain error affecting his substantial rights.
[A] defendant could choose to say nothing about a judge’s plain lapse under Rule 11 until the moment of taking a direct appeal, at which time the burden would always fall on the Government to prove harmlessness. A defendant could simply relax and wait to see if the sentence later struck him as satisfactory; if not, his Rule 11 silence would have left him with clear but uncorrected Rule 11 error to place on the Government’s shoulders.
Dominguez Benitez
in turn holds that in order to demonstrate that his substantial rights were affected by a defect in the Rule 11 plea colloquy that he did not bring to the district court’s attention, a defendant must convince the court that it is reasonably likely that he would not have pleaded guilty had he been properly apprised of his rights.
As Vonn makes clear, the burden of establishing entitlement to relief for plain error is on the defendant claiming it, and for several reasons, we think that burden should not be too easy for defendants in Dominguez’s position. First, the standard should enforce the policies that underpin Rule 52(b) generally, to encourage timely objections and reduce wasteful reversals by demanding strenuous exertion to get relief for unpre-served error. Second, it should respect the particular importance of the finality of guilty pleas, which usually rest, after all, on a defendant’s profession of guilt in open court, and are indispensable in the operation of the modern criminal justice system. And, in this case, these reasons are complemented by the fact, worth repeating, that the violation claimed was of Rule 11, not of due process.
We hold, therefore, that a defendant who seeks reversal of his conviction after a guilty plea, on the ground that the district court committed plain error under Rule 11, must show a reasonable probability that, but for the error, he would not have entered the plea. A *613 defendant must thus satisfy the judgment of the reviewing court, informed by the entire record, that the probability of a different result is sufficient to undermine confidence in the outcome of the proceeding.
Id.
at 82-83,
These two decisions leave no doubt as to the standard of review that governs Williams’ claim, which of the parties bears the burden of proof, and what must be shown. As in Vonn and Dominguez Beni-tez, there was a failure to apprise Williams of the nature of the right that he was surrendering in his waiver, and as in those two cases, Williams did not raise the omission in the district court. As a result, our review is for plain error, and it is Williams who must show that his substantial rights were affected by the error. He must show that he did not have a concrete understanding of his right to a jury trial, and that but for the trial court’s failure to ensure he had that understanding, there is a reasonable probability that he would not have waived the right. Our assessment of Williams’ waiver is informed not just by his colloquy with the district judge (which in this case was limited to asking him whether he wished to waive his right to a jury) but by the entire record.
Nothing in this record reveals that Williams lacked a concrete understanding of his right to a jury trial or that he likely would have elected a jury trial but for the district court’s failure to properly admonish him as to the nature of this right. It is entirely possible that Williams did have an adequate understanding of the right, whether by virtue of his attorney’s advice or his own education and experience, and that he still would have waived a jury trial assuming that the court had followed Scott and Delgado (and for that matter, Rule 23) to the letter. It is also possible that Williams had no idea what he was doing and that he would have insisted on a jury trial had he been properly admonished. We have no way to assess his mental state on this record.
That it is Williams who bears the burden of production and persuasion dictates the outcome. Having submitted not so much as his own affidavit averring that he did not adequately comprehend the nature of his right to a jury trial and that he would not have waived the right had he properly understood it, Williams has failed to produce any evidence which would demonstrate that his substantial rights were affected. He has not shown (and on this record cannot show) that plain error occurred, and we have no choice but to affirm his conviction.
Williams endeavors to avoid this result and to distinguish
Vonn
and
Dominguez Benitez
by characterizing as a structural error the district court’s failure to properly admonish him as to the nature of his right to a jury. Structural errors comprise “a limited class of fundamental constitutional errors that defy analysis by ‘harmless error’ standards.”
Neder v. United States,
But structural errors are rare,
Recuenco,
Our adherence to the approach that the Supreme Court set forth in
Vonn
and
Dominguez Benitez
does not compel us to abandon language in our earlier decisions to the effect that we will not presume a valid waiver of the defendant’s right to a jury trial from a silent record.
See Robinson,
Our decision today may amount to a departure from
Robinson
to the extent that
Robinson
treated the validity of a jury waiver as a preserved issue although, as in this case, it was first raised on appeal. We note that the waiver in
Robinson
was memorialized solely by counsel and by the court, without confirmation on the record by Robinson himself that he wished to waive his right to a jury. On that record, we presumed that Robinson had only learned of his right to a jury when he conferred with appellate counsel and that, consequently, his first opportunity to raise the issue was on appeal.
When we heard oral argument in this case, we raised the possibility that Williams might wish to drop this direct appeal (which raises no issue other than the jury waiver) and reserve the validity of his waiver for collateral review under 28 U.S.C. § 2255, and the opportunity that might afford him to develop the record as to the relevant facts surrounding his waiver.
See, e.g., United States v. Rosario,
Williams obviously has access to his own mental state and could have made a record in the district court as to what he did or did not understand about his right to a jury and whether he still would have waived a jury trial had he known all that he was entitled to know about that right. Under Vonn and Dominguez Benitez, he bears the consequence of his failure to make a record on these subjects. As he has not shown that his substantial rights were affected by the district court’s failure to engage in a Delgado inquiry before accepting his waiver, we must affirm his conviction.
III.
Because Williams did not challenge the validity of his jury waiver in the district court, he must show that the district court committed plain error in accepting his waiver without ensuring that his waiver was intelligent. On a record that is largely silent as to the informed nature of Williams’ waiver, he cannot make this showing. We take the opportunity to remind the district courts and counsel for both defendants and the government that they are obliged to follow the dictates of Rule 23(a) and our decisions in Scott and Delgado in accepting a defendant’s jury waiver and proceeding with a bench trial.
Affirmed
Notes
. Both
Robinson
and
Rodriguez
adhere to the Supreme Court's decision in
Bank of Nova Scotia v. United States,
. We note that prior to
Vonn,
the Ninth Circuit followed a similar approach to plea-colloquy defects, placing the burden on the government to show that any error in admonishing the defendant of his rights before accepting his guilty plea was harmless, even if the error had not been raised below, and reversing in the absence of such a showing.
See United States v. Odedo,
