The web search results mention Ohtani and Roberts protesting after an incident, but none of the provided evidence explicitly confirms the 'opening game of a three-game series in San Francisco with the rival Giants on Tuesday' as the specific context for the incident. The evidence is suggestive but lacks the necessary corroboration for a higher verdict.

Multiple web search results reference Lou Seal and Ohtani in the context of Giants games, suggesting the interaction occurred. However, the evidence does not provide enough independent sources or specific details to corroborate the claim that 'Lou Seal crept into his space to needle him' as a definitive, repeated fact across multiple sources.

The web search results show instances of Dave Roberts interacting with Ohtani, but none of the provided evidence explicitly details the sequence of events where Ohtani 'turned back toward Dodgers manager Dave Roberts to tattle on the giant seal.' This specific sequence is not confirmed by multiple sources.

The web search results confirm that Lou Seal was present during a game against the Dodgers, and that Roberts was involved in related incidents. However, the evidence does not provide enough independent sources or specific details to corroborate the claim that 'Roberts was seen barking at Lou Seal from the dugout, causing the mascot to back off' as a confirmed sequence of events.