Jаrrod Wagner commenced this products-liability lawsuit against Hesston Corporation, AGCO Corporation, and AGCO Corporation of Delaware (collectively, “Defendants”) after he was injured by a hay baler manufactured by Hesston. Wagner asserted claims of strict liability and negligence, alleging design and manufаcturing defects in the baler. Wagner proffered two experts who intended to testify that the baler was defective, but the District Court 1 excluded the proposed testimony as unreliable. Because Wagner could not prevail on any of his claims without expert testimony, the District Court entered summary judgment for Dеfendants. We affirm.
Wagner was injured by a Hesston 5600 Baler that was manufactured in 1974 and purchased by Wagner’s father in 2000. While baling hay on July 10, 2001, Wagner noticed that the baler had stopped accepting hay. With the power supply to the baler still engaged, Wagner stepped off the tractor and approаched the baler to investigate. Wagner leaned over the baler frame and placed his left hand in hay that was covering the baler’s pick-up tines. The tines suddenly began to move, and Wagner’s hand was pulled into the baler’s compression rollers. After the passage of some time, Wagner elected to self-amputate his left hand.
Wagner brought suit, asserting that the Hesston 5600 Baler was defectively designed and manufactured. His four-count complaint alleged claims of strict liability, negligence, and breach of express and implied warranties under Minnesota law.
2
Wagner designated John Sevart and Jonathаn Chaplin as experts in the design of agricultural products who would testify that the Hesston 5600 Baler was defective. In their reports, both Sevart and Chaplin opined that the baler (1) should have had a safety guard at the intake point, (2) should have had an emergency stop device, and (3) should have featured аn open throat
3
— as opposed to a compression roller — design.
4
Defendants moved to exclude the
*758
opinions of Sevart and Chaplin pursuant to Rule 702 of the Federal Rules of Evidence and the principles set forth in
Daubert v. Merrell Dow Pharmaceuticals, Inc.,
Under the framework developed in
DaubeH,
trial courts must serve as “gatekeepers to ‘insure that proffered expert testimony is both relevant and reliable.’ ”
Anderson v. Raymond Corp.,
The District Court excluded the testimony of Sevart and Chaplin on the ground that their opinions were not reliable. Rule 702 permits expert testimony only if it is “the product of reliable principles and methods.”
5
In
DaubeH,
the Supreme Court set forth a number of factors that district courts may consider in assеssing reliability: (1) whether the theory “can be (and has been) tested,” (2) whether the theory “has been subject to peer review and publication,” (3) “the known or potential rate of error,” and (4) whether the theory enjoys general acceptance in the relevant scientific community.
The District Court applied these factors to the experts’ three design-defect theories. 6 The District Court began by addressing each expert’s proffered opinion that the absence of a guard at the feed intake point of the Hesston 5600 Baler violated basic рrecepts of design and rendered the baler defective. The court found that Sevart’s minimal testing of this theory (via limited and largely undocu *759 mented tests performed more than twenty years ago in connection with other litigation), the slim evidence of peer review, 7 the lack of evidence showing general acceptance in the industry of safety guards for large round balers similar to the Hesston 5600, and Sevart’s admission that all but one of his alternative guard designs were built in connection with litigation, all weighed against the admissibility of Se-vart’s testimony. Similarly, the District Court concluded that Chaplin’s opinion was speculativе and inadmissible because he tested his safety-guard theory by baling a single bale of hay, the test was performed on Wagner’s baler for the sole purpose of this litigation, and there was no evidence of peer review or general acceptance of the theory. The District Court further notеd Chaplin’s concession during his deposition that his proposed alternative design was subject to clogging and maintenance problems. Next, the District Court analyzed the proposed experts’ theory that the Hesston 5600 Baler was defective because it used compression rollers at the intakе point rather than an open throat design that was commercially available when the Hesston 5600 Baler was manufactured in 1974. The court concluded that this theory of a reasonable alternative design was not reliable because Wagner submitted no evidence that the open throat balers on the market in 1974 produced hay bales of the quality produced by the Hes-ston 5600 Baler. Finally, the District Court addressed the proffered experts’ theory that the Hesston 5600 Baler was defective because it lacked an emergency stop cable that could have allowed Wagner to disengage the power to the baler thereby preventing the compression rollers from grinding his hand and arm. The court first questioned whether Sevart, a mechanical engineer, was qualified to render an opinion that an operator caught in the baler would have less severe medical injuries if the comprеssion rollers stopped rotating. Even assuming Sevart was qualified to render the opinion, the court rejected Sevart’s theory as unreliable on the grounds that it had not been sufficiently tested, that evidence of peer review was minimal, that Wagner presented no evidence that emergency stop devices had been generally incorporated into compression roller hay balers, and that the theory was formulated in connection with this litigation. Because Chaplin simply adopted Sevart’s theory without designing, installing, or testing an emergency stop device himself, the court also excluded Chаplin’s testimony as unreliable.
Wagner argues that the District Court erred in excluding the testimony of Sevart and Chaplin because Minnesota substantive law does not require proof of an alternative feasible design in products-liability cases. In making this argument, Wagner appears to be contending that the District Court (erroneously) deemed the existence of a safer alternative feasible design an essential element in Wagner’s case. We note two substantial flaws in Wagner’s argument.
First, Wagner’s argument is based on a faulty premise. The District Court did
not
require Wagner (via his experts) to present proof of an alternаtive feasible design as an element of his prima facie case under Minnesota law. Rather, the District Court applied Daubert’s first factor — whether the scientific theory presented has been tested' — -in evaluating the reli
*760
ability of Sevart’s and Chaplin’s proffered testimony. It was Sevart and Chaplin, not the Distriсt Court, who put evidence of an alternative design at issue by theorizing that the Hesston 5600 Baler was defective because it did not include a safety guard, an open throat design, and an emergency stop device (alternative designs). Had Wagner chosen to present different evidence showing that thе baler was defective, evidence of an alternative feasible design need not have been discussed. Under the design-defect theory that Wagner presented, however, the District Court properly exercised its gatekeeping role when it applied federal law in analyzing whether testing of thе proffered experts’ theories indicated that the experts’ testimony was reliable.
See Unrein v. Timesavers, Inc.,
Second, Wagner’s assertion that Minnesota substantive law does not require proof of an alternative feasible design in a products-liability case is a bit misleading. Minnesota requires a plaintiff in a products-liability case to prove that the product was defective аnd was unreasonably dangerous.
Kallio v. Ford Motor Co.,
To the extent that Wagner attacks the District Court’s ruling on other additional grounds, we will not recapitulate the District Court’s impressively thorough analysis supporting its conclusions that the proposed testimony of Sevart and Chaplin was unreliable. Suffice it to say that we have studied the record, read the briefs, and heard argument and do not discern any error in the District Court’s decision. “The analysis conducted by the District Court is precisely the type of analysis the decision in
Daubert
would appear to contemplate. Because [Wagner’s] proffered expert testimony did not satisfy the criteria set out in
Daubert,
the District Court’s preclusion of that testimony was not a clear abuse of discretion.”
Gier v. Educ. Serv. Unit No. 16,
Wagner concedes that “[wjithout the testimony of Sevart and Chaplin, there are no genuine factual disputes and Wagner cannot prevail.”
9
Appellant’s Br. at 43. It follows that summary judgment was appropriate.
See Trost v. Trek Bicycle Corp.,
The judgment of the District Court is affirmed.
Notes
. The Honorable Joan N. Ericksen, Unitеd States District Judge for the District of Minnesota.
. Wagner does not appeal the dismissal of his warranty claims.
. The term "open throat” refers to a baler that uses an open feed intake area without compression rollers.
. In addition, Chaplin asserted that the manufacturer failed to instruct opеrators on the proper removal of blockage, that the baler’s compression rollers defectively operated at different speeds, and that the warning decals *758 on. the baler were inadequate. Wagner does not appeal the District Court's decision excluding Chaplin's testimony rеgarding the failure to instruct and compression roller speed. It is not clear whether Wagner appeals the District Court's decision excluding Chaplin's testimony regarding the warning decals; to the extent that Wagner does appeal this decision, we affirm tire District Court.
. In full, Rule 702 states:
If scientific, technical, or other sрecialized knowledge will assist the trier of fact to understand the evidence or to determine a fact in issue, a witness qualified as an expert by knowledge, skill, experience, training, or education, may testify thereto in the form of an opinion or otherwise, if (1) the testimony is based upon sufficient facts оr data, (2) the testimony is the product of reliable principles and methods, and (3) the witness has applied the principles and methods reliably to the facts of the case.
. The District Court did not consider the third Daubert factor regarding the potential rate of error because it is not applicable to the facts of this case.
. Wе reject Wagner's argument, raised for the first time in his reply brief, that peer review does not apply to non-medical devices. Appellant's Reply Br. at 4.
See Peitzmeier v. Hennessy Indus., Inc.,
. Wagner correctly notes that "[o]ur cases do not require that experts manufacture a new device or prototype in order for their opinion to be admitted.”
Unrein,
. In his reply brief, Wagner argues for the first time that he was not required to present any evidence, "expert or otherwise,” on an alternative design, thus making the District Court's entry of summary judgment erroneous. Appellant’s Reply Br. at 2. We note that this issue was not raised below and we will not consider it on appeal.
See Wilson v. City of Des Moines,
