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About Riley O\'Brien
I don't have reliable information about a Major League Baseball player named Riley O'Brien in my training data. Rather than provide potentially inaccurate details about their career, playing style, or accomplishments, I'd recommend checking current MLB rosters, Baseball-Reference.com, or MLB.com for the most accurate and up-to-date information about this player. If you could provide additional context such as the team they play for or the years they've been active, I may be able to help you better.