ORDER AND MEMORANDUM ***

Demas Yan (“Tan”) appeals from the decision of the district court affirming the bankruptcy court’s dismissal of his cross-complaint in one of a series of lawsuits related to his bankruptcy. We have jurisdiction pursuant to 28 U.S.C. § 158(d)(1), and we affirm.

A bankruptcy estate includes all legal and equitable interests in property held by the debtor at the time of filing, including all causes of action the debtor could have brought outside bankruptcy. In re Jess, 169 F.3d 1204, 1207 (9th Cir. 1999) (citing U.S.C. § 541(a)). Yan contends that his cross-complaint alleged acts giving rise to causes of action that accrued both before and after conversion to bankruptcy. The bankruptcy court did not agree but granted Yan leave to amend the cross-complaint to specify the postpetition nature of his claims. Yan declined to do so, choosing instead to appeal to the district court. Reviewing the district court’s decision de novo, Barrientos v. Wells Fargo Bank, N.A., 633 F.3d 1186, 1188 (9th Cir. 2011), we agree that the claims as alleged accrued prepetition or that Yan could reasonably have contemplated the claims’ existence prior to the petition date. Thus, the claims were “sufficiently rooted in the pre-bankruptcy past,” and are properly included as property of the bankruptcy estate under § 541. Segal v. Rochelle, 382 U.S. 375, 380, 86 S.Ct. 511, 15 L.Ed.2d 428 (1966). While Yan may have been able to present adequate claims in an amended cross-complaint, he chose not to do so. Accordingly, affirmance of the bankruptcy court was appropriate.

Appellees filed a motion under Federal Rule of Appellate Procedure 38 and 28 U.S.C. § 1927 requesting that we impose sanctions on Yan, an attorney, for filing a frivolous appeal. We grant Appellees’ motion for sanctions for filing a frivolous appeal pursuant to Rule 38 of the Federal Rules of Appellate Procedure. 1 “An appeal is considered frivolous if the result is *688 obvious or the appellant’s arguments are wholly without merit.” Adriana Int'l Corp. v. Thoeren, 918 F.2d 1406, 1417 (9th Cir. 1990). Yan’s position in this appeal is wholly without merit. We therefore impose attorneys’ fees and double costs under Federal Rule of Appellate Procedure 38.

The determination of an appropriate amount of fees on appeal is referred to the court’s special master, Appellate Commissioner Peter Shaw, who shall conduct whatever proceedings he deems appropriate, and who shall have the authority to enter an order awarding fees. See 9th Cir. R. 39-1.9.

AFFIRMED.

Appellees’ Request for Judicial Notice and First Supplemental Request for Judicial Notice in support of Appellees’ Motion for Sanctions and Attorney’s Fees are GRANTED.

Appellees’ Motion for Sanctions and Attorney’s Fees is GRANTED.