While the evidence confirms Peter Seidler owned the Padres and that the Padres acquired stars like Fernando Tatis Jr. and Manny Machado, the evidence provided does not contain multiple independent sources confirming that Seidler was responsible for acquiring *all* three specific players (Machado, Tatis Jr., and Juan Soto) as a cohesive narrative. The evidence is descriptive of Seidler's tenure but lacks corroboration for the full scope of the claim.

The claim that Peter Seidler was prepared to spend $600 million for Juan Soto is mentioned in a web search result contextually linking it to Scott Boras' bidding war. However, this specific detail is not corroborated by a second independent source, limiting the verdict to single_source.

The claim that A.J. Preller signed Lucas Giolito for a prorated $3M is not supported by any of the provided evidence. The evidence for this claim consists of generic web search results about HTML encoding and Wikipedia entries about the Padres, which do not mention A.J. Preller signing Lucas Giolito. Therefore, the claim cannot be verified or corroborated.