Blueseventy Swim of the Week: MacNeil Destroying Conversions In 100 FL


Disclaimer: Blueseventy Swim of the Week is not meant to be a conclusive selection of the best overall swim of the week, but rather one Featured Swim to be explored in deeper detail. The blueSeventy Swim is an opportunity to take a closer look at the context of one of the many fast swims this week, perhaps a swim that slipped through the cracks as others grabbed the headlines, or a race we didn’t get to examine as closely in the flood of weekly meets.

It’s a common theme in NCAA recruiting that projected conversions from long course times rarely give an accurate picture of an athlete’s short course yards impact. But most of the time, those critiques of time conversions are attempting to lower expectations on athletes, who don’t often immediately translate their long course speed to the short course pool.

For Michigan’s Maggie MacNeilwe could make the opposite argument. Time conversions just didn’t do her speed justice.

When she verbally committed to Michigan last fall, the 17-year-old MacNeil was 59.54 in the long course 100-meter fly – a time we roughly converted to 52.37 in short course yards. Over the summer of 2018, MacNeil would drop to 58.38 at Junior Pan Pacs, converting to about 51.33 in yards with our simple converter and 51.46 in our Swimulator converter.

MacNeil essentially hit the first conversion in her first meet, out, going 52.69 in a Sept. 28 dual with Miami. She rattled the next two conversions in an Oct. 19-20 dual with Northwestern, hitting a 51.49, then going 51.57 in a triangular a couple weeks later.

But last weekend, she shattered all projections, smashing to a 50.09 at the ACC-Big Ten Challenge. That’s the top time in the nation this year, the top freshman time of all-time and the 6th-best performance in history in the event. MacNeil now appears on track to become just the fourth swimmer to break 50 seconds in the event, joining Kelsi Dahlia, Louise Hansson and Erika Brown.

MacNeil, Hansson and Brown should compete for the NCAA title this year, a conversation in which MacNeil went from an outsider dark-horse pick to perhaps the frontrunner. Her swim last weekend proves that while we often overestimate long-course-to-short-course conversions, we can sometimes underestimate them, too.



There isn’t a second that goes by when the team at blueseventy aren’t thinking about you. How you eat, breathe, train, play, win, lose, suffer and celebrate. How swimming is every part of what makes you tick. Aptly named because 70% of the earth is covered in water, blueseventy is a world leader in the pool and open water. Since 1993, we design, test, refine and craft products using superior materials and revolutionary details that equate to comfort, freedom from restriction and ultimately a competitive advantage in the water. This is where we thrive. There is no substitute and no way around it. We’re all for the swim.

2016 blueseventy banner for Swim of the Week b70_300x300-aftsVisit to learn more.

Instagram: @blueseventy

Twitter: @blueseventy


blueseventy is a SwimSwam partner.

In This Story

Leave a Reply

Notify of
newest most voted
Inline Feedbacks
View all comments
Northern SwimParent
3 years ago

Way to go Maggie!!!!

Reply to  Northern SwimParent
3 years ago

Maggie’s just a freshman and she’s already BROKEN 50 SECONDS (two weeks after this article was written)!
Maggie and Kelsi in Tokyo 2020!

About Jared Anderson

Jared Anderson

Jared Anderson swam for nearly twenty years. Then, Jared Anderson stopped swimming and started writing about swimming. He's not sick of swimming yet. Swimming might be sick of him, though. Jared was a YMCA and high school swimmer in northern Minnesota, and spent his college years swimming breaststroke and occasionally pretending …

Read More »