ORDER OVERRULING OBJECTIONS TO AND ADOPTING RECOMMENDATION OF THE UNITED STATES MAGISTRATE JUDGE

ROBERT E. BLACKBURN, District Judge.

The matters before me are (1) the Recommendation of United States Magistrate Judge [#298],1 filed January 15, 2015; and (2) Plaintiff Mr. Carbajal's Contemporaneous Objection to the Honorable Magistrate Kristen Mix's Recommendation [#298] Denying Leave To Amend [#307], filed February 17, 2015. I overrule the objection, adopt the recommendation, and deny the apposite motion to amend the complaint.

As required by 28 U.S.C. § 636(b), I have reviewed de novo all portions of the recommendation to which objections have been filed, and have considered carefully the recommendation, objections, and applicable caselaw. Moreover, because plaintiff is proceeding pro se, I have construed his pleadings more liberally and held them to a less stringent standard than formal pleadings drafted by lawyers. See Erickson v. Pardus, 551 U.S. 89, 94, 127 S.Ct. 2197, 2200, 167 L.Ed.2d 1081 (2007); Andrews v. Heaton, 483 F.3d 1070, 1076 (10th Cir. 2007); Hall v. Bellmon, 935 F.2d 1106, 1110 (10th Cir. 1991) (citing Haines v. Kerner, 404 U.S. 519, 520-21, 92 S.Ct. 594, 595-96, 30 L.Ed.2d 652 (1972)). Nevertheless, plaintiff's objections are imponderous and without merit.

Plaintiff's motion to amend relied exclusively on the liberal standard for amendment of pleadings set forth in Fed. R. Civ. P. 15(a). However, as the magistrate judge cogently explained, where, as here, the deadline for the amendment of pleadings set forth in the apposite scheduling order has passed, a party must first meet the more rigorous good cause standard contemplated by Rule 16(b)(4). As detailed in the recommendation, plaintiff admitted that the new legal theories he wished to assert by way of amendment were based on the same facts and defenses asserted in the original pleading. As plaintiff offered no explanation in his motion why these theories could not have been raised prior to the expiration of the deadline for the amendment of pleadings (some ten months prior to the filing of the instant motion), the magistrate judge properly concluded that he failed to demonstrate diligence in the bringing of these claims, and thus recommends that his motion be denied.

By way of his objection, plaintiff radically reverses course2 and now argues that he could not have met the deadline because the information on which his proposed amended complaint is based is new and was withheld from him until recently.3 This argument fails on both procedural and substantive grounds. Procedurally, plaintiff failed to present these arguments in his motion, and thus he has waived them. United States v. Garfinkle, 261 F.3d 1030, 1031 (10th Cir. 2001) ("In this circuit, theories raised for the first time in objections to the magistrate judge's report are deemed waived."); Marshall v. Chater, 75 F.3d 1421, 1426 (10th Cir. 1996) ("Issues raised for the first time in objections to the magistrate judge's recommendation are deemed waived.").

Substantively, and even assuming arguendo that I accept plaintiff's wholly unsubstantiated assertion that defendants improperly delayed producing evidence, plaintiff fails to demonstrate how that evidence justifies the proposed amendment to the pleadings in any event, let alone at this very late stage of the proceedings. Plaintiff offers no particulars of the content of the allegedly belated Rule 26 disclosures that he claims "revealed details concerning the defendants' action, including additional evidence that supported another invasion of privacy claim."4 (Obj. at 5.) His suggestion that dispatch records received in December — support amendment is likewise unsubstantiated. Plaintiff claims this evidence contains references to other officers whom, he speculates, might have relevant information. Aside from the fact that there is nothing other than wild conjecture to support even the barest inference that these officers have relevant knowledge of the underlying facts of this case, plaintiff's proposed amended complaint adds neither new factual information nor names new defendants. He thus has failed to show any nexus between this information and the content of his proposed amendment.

Aside from these compelling considerations, I note that motions for summary judgment now have been filed and briefed, and are ripe for determination. It would be a perversion of the Federal Rules of Civil Procedure to allow plaintiff to make his case a moving target in the manner proposed here:

Pallottino v. City of Rio Rancho, 31 F.3d 1023, 1027 (10th Cir. 1994) (citations and internal quotation marks omitted). See also Hayes v. Whitman, 264 F.3d 1017, 1027 (10th Cir. 2001) ("`[W]e do not favor permitting a party to attempt to salvage a lost case by untimely suggestion of new theories of recovery.'") (quoting Viernow v. Euripides Development Corp., 157 F.3d 785, 800 (10th Cir. 1998)); Evans v. McDonald's Corp., 936 F.2d 1087, 1091 (10th Cir. 1991) ("We do not believe, however, that the liberalized pleading rules permit plaintiffs to wait until the last minute to ascertain and refine the theories on which they intend to build their case.").

Therefore, I find and conclude that the arguments advanced, authorities cited, and findings of fact, conclusions of law, and recommendation proposed by the magistrate judge should be approved and adopted.

THEREFORE, IT IS ORDERED as follows:

1. That the Recommendation of United States Magistrate Judge [#298], filed January 15, 2015, is approved and adopted as an order of this court;

2. That the objections stated in Plaintiff Mr. Carbajal's Contemporaneous Objection to the Honorable Magistrate Kristen Mix's Recommendation [#298] Denying Leave To Amend [#307], filed February 17, 2015, are overruled;

3. That Plaintiff's Motion To File Amended Complaint [#284], filed December 23, 2104, is denied.