Employment Litigation · Primary-source case analysis

Transportation Management: The Employer Bore the Same-Decision Burden After Protected Conduct Motivated Discharge

By Aneeta Mishra and Timothy Chan

Published August 22, 2026 · Updated October 20, 2026

Decision: NLRB v. Transp. Mgmt. Corp., 462 U.S. 393 (1983).

An employer’s proof that a worker broke a rule is different from proof that it would have fired the worker without the union activity. In NLRB v. Transportation Management Corp., 462 U.S. 393 (1983), the Supreme Court upheld the Board’s allocation of those questions and found substantial evidence supporting its conclusion that the employer had not proved its same-decision defense. The June 15, 1983 decision reversed the First Circuit’s refusal to enforce the Board’s order. The actual discipline record—not the existence of an asserted rule violation alone—explains the result. Transportation Management, pages 404–405.

Organizing and the discharge decision followed a short chronology

Bus driver Sam Santillo contacted a union on March 19, 1979, and distributed authorization cards during the following days. Supervisor Patterson learned about the organizing on March 23. His response included hostility toward Santillo and an intention to get even. Santillo was discharged on March 26. The employer asserted that he had left his keys in the bus and taken unauthorized breaks. Transportation Management, pages 395–397.

The sequence weakened the stated reasons. Patterson did not learn of the particular key incident until after the discharge decision. Drivers commonly left their keys in buses. The break practices also were commonplace and had not previously brought discipline. Santillo had not received the warnings ordinarily used before discharge. Those were concrete reasons to doubt that the same action would have occurred without his organizing. Transportation Management, pages 396–397, 404.

The administrative law judge found an unlawful discharge, and the Board adopted that decision. The First Circuit refused enforcement because it thought the General Counsel had to prove that the discharge would not have happened independently of the protected conduct. The Supreme Court disagreed with that allocation and then examined whether the record supported the Board’s actual finding. Transportation Management, pages 397–398, 404–405.

The General Counsel had to prove unlawful motivation

The Court described the Board’s framework in Wright Line, 251 N.L.R.B. 1083 (1980), as keeping an initial persuasion burden on the General Counsel. By a preponderance of the evidence, the General Counsel had to establish that protected union conduct was a substantial or motivating factor in the discharge. The employer’s knowledge, the supervisor’s hostility and the short decision chronology mattered to that question. Proof of unlawful motivation came before the separate defense. Transportation Management, pages 398, 400–403.

Once that showing was made, the employer had a separate affirmative defense: It could prove, also by a preponderance, that it would have discharged the employee for permissible reasons even without the protected activity. This was a burden of persuasion, not simply an obligation to name a lawful reason. The Court treated the defense as distinct from the elements the General Counsel still had to prove. Transportation Management, pages 400–402.

The statute permitted the separate same-decision defense

Section 10(c) required proof of an unfair labor practice by a preponderance and protected discharge for cause from an improper reinstatement or backpay order. The Court concluded that the Board’s allocation was consistent with those directions. Requiring the General Counsel to prove unlawful motivation satisfied the first requirement; permitting the employer to establish that lawful cause independently would have produced discharge addressed the second. The statute did not compel the First Circuit’s approach. Transportation Management, pages 400–403.

The Court examined the “for cause” proviso’s history. Congress had reacted to perceived Board decisions inferring antiunion motive from union activity despite gross misconduct. That history assumed either lawful cause or unlawful punishment; it did not answer who must prove what would have happened when both motives actually contributed. Here, unlawful motivation had already been established, rather than inferred from membership alone. Transportation Management, pages 401–402 and footnote 6.

The opinion also kept the Board’s choice distinct from a mandatory statutory rule. It assumed the Board might instead treat a proven same decision as limiting remedies without eliminating the violation. The Board had chosen an affirmative defense to the violation finding, and the Court upheld that choice as permissible. The assumed remedy-only alternative was not the framework the Board applied to Santillo. Transportation Management, pages 402–403.

The Court also considered it reasonable to place the uncertainty about the employer’s independent reason on an employer already shown to have acted with an unlawful motive. The Court compared the allocation with the constitutional retaliation framework in Mt. Healthy City Board of Education v. Doyle. That comparison supported its approval of the Board’s NLRA construction. Transportation Management, pages 402–403.

Common infractions and omitted warnings defeated this defense

The final application gave the framework practical content. At least two asserted transgressions were commonplace, yet other drivers had not been disciplined. The employer departed from its usual practice without warning Santillo or even expressing disapproval of the conduct. Patterson, who initially decided to discharge him, was openly upset about his protected activities. Taken together, those circumstances supported the Board’s finding that the employer would not have discharged Santillo without the organizing. The Court found substantial evidence on the whole record and reversed the appellate judgment. Transportation Management, pages 404–405.

A later Supreme Court decision rejected one part of the opinion’s reasoning while expressly preserving its holding. In Director, Office of Workers’ Compensation Programs v. Greenwich Collieries, 512 U.S. 267, 276–278 (1994), the Court rejected footnote 7’s view that the Administrative Procedure Act’s burden-of-proof provision concerned only producing evidence. It held that the provision also assigns the burden of persuasion. But it specifically explained why Transportation Management remained intact: Unlawful motivation had to be proved first, and only then did the employer carry persuasion on its affirmative defense. That sequential structure was consistent with the APA even under the corrected persuasion reading. This is the precise distinction to preserve when citing the case on administrative burdens. Greenwich Collieries, pages 276–278.

This analysis concerns the Board’s framework and Santillo’s union-activity discharge. A current case requires the governing Board and court authorities for the specific claim. Similar terminology elsewhere can have different consequences: Our Harris analysis explains FEHA’s liability/remedy distinction, and our Desert Palace analysis addresses the amended Title VII provisions. Neither should be substituted for the NLRA analysis here.

Compare the employer’s actual practice with its asserted reason

A useful discipline record answers more than whether an infraction occurred. When did the decisionmaker learn of it? What happened when other drivers committed the same infraction? Did the employer use its ordinary warning process? Preserve the contemporaneous notices and communications that answer those questions. Santillo’s case demonstrates why management knowledge, comparative discipline and departures from ordinary practice can test a claimed same decision more effectively than a general accusation of unfair treatment.