Ethan Holliday is a name making rounds amid virtually every Major League Baseball draft analyst. The 18-year-old shortstop from Stillwater, Oklahoma, is not only a top prospect but a true marvel. As the offspring of MLB All-Star Matt Holliday and the younger sibling of 2022’s top draft pick Jackson Holliday, Ethan has a legacy to live up to. His senior season was nothing short of remarkable as he posted video game numbers, hitting .611 with 19 home runs and 64 RBIs. He is widely regarded as the consensus top prospect for the 2025 draft.
A rival coach, Dean Wilson, put it best: “He covers the entire plate with pop. There’s really nowhere to go… just make your best pitch and know that he’s hitting it hard.”
As interest around his name grows, fans seem more intrigued about his personal life, specifically, who is supporting him behind the scenes. Accompanying him on his journey is his high school sweetheart, Mary O’Neil, who has always been there as he prepares for the next huge milestone in his remarkable career.
Who is Ethan Holliday’s girlfriend, Mary O’Neill? Know more about the MLB draft’s No.1 prospect’s partner
Ethan Holliday and Mary O’Neill grew up in Stillwater, Oklahoma, as high school sweethearts. Their love story mirrors that of Ethan’s older brother, Jackson, who also met his wife at the very same high school. Mary has been by Ethan’s side and supported him through all, including his senior year. They share a lot of social media content, showing their very strong connection, cherished by the entire Holliday family.
For Mary’s birthday on October 20, 2024, Ethan posted a heartwarming romantic picture. And there was a simple and sweet caption: “Happy birthday, Mo, I love you so much .” His sister, Gracyn Ivy, echoed that sentiment, posting, “Happy birthday Mary O’Neil, you’re just my favorite,” with an addition of “I love you.”
And Mary returns the same love, or maybe more. In June 2025, Mary posted a beautiful photo of them, calling Ethan, “My best friend !! 🩵🩵🩵.”
It’s not just love they share. Mary shared another Instagram story from Ethan’s Senior Night at Stillwater High, showing them together at home plate surrounded by his family. Captioned with pride, it read: “I’m so proud of you.”
Who is Mary O’Neill? All to know about her
While we know Mary O’Neill as Ethan’s supportive girlfriend, what you may not know is her drive as an athlete and her passion. A student and a recent graduate from Stillwater High School, Mary has balanced her academic career with a beautiful presence in her dedicated participation in cheerleading. She shares her experience on social media, her stage to celebrate team achievements and show the hard work that goes into the sport, which is very demanding.
Mary has competed for years on both her high school squad and the competitive all-star team Twist and Shout Obsession. She understands the dedication required to excel. In one interview, she stated, “Cheer is not easy and it takes a lot of blood, sweat, and tears … If you don’t love it, it’s really hard to get any better.” This mindset showcases her own athletic grit.
In a recent post celebrating her return from injury, she cheerfully wrote, “TYJ I’m no longer a rookie #newachilles.”
What is her nationality, religion, and more
Mary O’Neill is an American national and has spent her entire life in Stillwater, Oklahoma. She is deeply rooted in American high school culture, which includes being a cheerleader for her school and a superfan of the school’s baseball team. O’Neill is of Irish origin, although there is no publicly available information confirming her detailed family background.
Mary’s bio states that she is a Christian. While the exact practices or affiliations remain undisclosed. Her beliefs complement the values held by the Holliday family.
With the 2025 MLB Draft on the horizon, Ethan Holliday is ready for the moment that will change his life forever. He is wonderfully talented and has an equally humble perspective, courtesy of his family and girlfriend, Mary. His brother, Jackson, put it best with his well wishes: “Hope you’re having fun… don’t put too much pressure on yourself… I think it’s just keeping it simple.”
What are your expectations for Ethan Holliday in the big leagues? Share them with us in the comments!
The post Who Is Ethan Holliday’s GF? A Look at the Top MLB Prospect’s Love Life Amid Rising Stardom appeared first on EssentiallySports.
