Summary
The United States District Court for the District of Kansas denied Plaintiff Ronald E. Sexton’s motion for leave to supplement his expert disclosures. The court held that Plaintiff failed to establish good cause or excusable neglect for designating Christopher Leaton after the scheduling-order deadline. The court also concluded that denying the motion would not be dispositive of Plaintiff’s claims because he had already disclosed another causation and origin expert.
Holdings
- Plaintiff failed to establish good cause because he did not show that the expert-disclosure deadline could not have been met despite diligent efforts and did not provide an adequate explanation for the delay.
- Plaintiff failed to establish excusable neglect because the delay was within his control, was substantial in context, prejudiced Defendant, and was not adequately explained by uncertainty about Defendant's litigation position.
- The court was not required to grant the motion or impose a lesser curative measure because Plaintiff did not substantively show that exclusion of Leaton would be dispositive of his claims.
Questions Presented
- Whether Plaintiff established good cause under Federal Rule of Civil Procedure 16(b)(4) to modify the scheduling order and designate Christopher Leaton as an additional expert after the deadline.
- Whether Plaintiff established excusable neglect for the untimely expert disclosure.
- Whether the potentially dispositive nature of excluding the proposed expert required consideration of lesser curative measures.
Disposition
other
Cases Cited (13)
- McPhaul v. Coll. Hills Opco, LLC, 2025 WL 2229971, at *3, *6-*7 (D. Kan. Aug. 5, 2025)(followed)
- CGB Diversified Servs., Inc. v. Forsythe, 2021 WL 672168, at *1 (D. Kan. Feb. 22, 2021)(followed)
- Tesone v. Empire Mktg. Strategies, 942 F.3d 979, 988-89 (10th Cir. 2019)(followed)
- Lyden v. Hogan Dedicated Servs., LLC, 2015 WL 6778941, at *2 (D. Kan. Nov. 16, 2016)(followed)
- MidAmerica Div., Inc. v. First Health Group Corp., 2025 WL 958274, at *7 (D. Kan. Mar. 31, 2025)(followed)
- Jones v. DG Retail, LLC, 2025 WL 3170823 (D. Kan. Nov. 13, 2025)(followed)
- Dag Enters., Inc. v. Exxon Mobil Corp., 226 F.R.D. 95, 105 (D.D.C. 2005)(followed)
- Ikona v. AHC of Overland Park, LLC, 2022 WL 4245478, at *5 (D. Kan. Sept. 15, 2022)(followed)
- White Way, Inc. v. Firemen’s Ins. Co. of Washington, D.C., 2022 WL 17177371, at *3 n.3 (D. Kan. Nov. 23, 2022)(followed)
- Coleman v. Blue Cross Blue Shield of Kan., 487 F. Supp. 2d 1225, 1234-35 (D. Kan. 2007)(followed)
Showing top 10 of 13.
Cited In (0)
No citing cases on record yet.
Court Document
Open PDFLoading document…