Again her testimony would be sufficient evidence in any court of law. I stand by that they could not find any corroborating evidence. I imagine in the other case, MLB was able to talk to witnesses. While there are great many protections for defendants, again the evidentiary and sufficiency standards are often much lower than you would anticipate. Private organizations make their own rules regarding what kind of evidence is sufficient; while they may not need prove beyond a reasonable doubt (probably just by preponderance, more likely than not), they per rule require direct or corroborating evidence (I'm speculating, but I think, generally, it's a sound policy, except it doesn't work well for sexual assault). Reasonable suspicion is the standard for the police to be able pull your car over or search you for their own safety. It doesn't apply to standards of proof or sufficiency of evidence.