South Lyon United's Radcliffe Approaching Milestone Win, Another History-Making Moment
By
Keith Dunlap
Special for MHSAA.com
May 7, 2026
Originally, Deanna Radcliffe got into coaching lacrosse simply because it was a nice summer job.
From that simple beginning, Radcliffe is now on the verge of making high school sports history within the state of Michigan.
No girls or boys lacrosse coach has reached 300 career victories since the sport became MHSAA-sponsored in 2005. But Radcliffe is oh-so-close. Following a win over Haslett on Wednesday, Radcliffe has 299 career victories.
The milestone 300th win likely will come Saturday when South Lyon United plays in a tournament at Saline.
In order to get their names etched in the record book, any high school coach in Michigan has had to reach at least 300 wins since the MHSAA brought the sport into its championship lineup. So Radcliffe is literally about to become the first and only coach in the MHSAA coaching records for lacrosse.
Radcliffe is in her 10th season coaching for South Lyon Unified and also coached at Hartland from 2013 to 2022. This is actually her second stint at South Lyon, where she spent seven years as head coach before taking the Hartland job.
“It just means I’ve been doing this for a long time,” Radcliffe said. “What it really represents to me is all the players, coaches and families I’ve had the opportunity to coach. I’ve been fortunate to coach in an area that was willing to embrace the sport. I have been able to catch some really great teams and athletes across all levels from youth to high school and even collegiately. That’s the part that means the most, those relationships and experiences. The wins are just a byproduct of that.”
Radcliffe got her start in lacrosse very young, saying she picked up the game at 3-4 years old while growing up in Pennsylvania. She was introduced to the game by her aunt.
“It just became part of my life early on,” she said.
Radcliffe eventually became good enough as a player to earn a college opportunity, ultimately being named the Atlantic 10 Offensive Player of the Year in 2003 while playing for Temple.
Radcliffe eventually started a career as a special education teacher and was a high school coach in Pennsylvania before moving to Michigan in 2006, where she has coached club, high school and even college lacrosse as she spent time as an assistant at Cleary University.
“I just enjoyed being around the game and the competitive environment, so I kept doing it,” Radcliffe said of what has kept her coaching. “Over time, it stopped being something I was just doing in the summers and became something I really valued and stayed connected to. It’s grown naturally from there, and I’ve been fortunate to continue coaching while also working in education.”
The most noteworthy win of her career came last June, when South Lyon Unified earned a 6-3 Division 1-clinching victory over Hartland to give Radcliffe her first MHSAA Finals championship as head coach in a matchup between the two programs she built up.
South Lyon Unified is 18-0 this season and has won 39 straight games going back to last spring's opener.
“She has so much knowledge of the sport and really cares for each and every one of us,” said South Lyon United senior captain Teagan Wesner. “Deanna has been one of the best coaches I have ever had, and I am extremely grateful to have had the opportunity to play for her. I am very happy for Deanna, and I am excited to be a part of the team who helped her reach 300 wins.”
When Radcliffe first arrived in Michigan, lacrosse was in its first years as a sanctioned sport by the MHSAA. Now, she has seen it grow by leaps and bounds.
“One of the most rewarding parts has been seeing the long-term impact,” she said. “Many of the players I once coached are now youth, high school or college coaches themselves. Some are officials, and some I’m even coaching against or alongside now. That’s been incredibly meaningful and really speaks to the strength of the community the sport has built.”
Keith Dunlap has served in Detroit-area sports media for more than two decades, including as a sportswriter at the Oakland Press from 2001-16 primarily covering high school sports but also college and professional teams. His bylines also have appeared in USA Today, the Washington Post, the Detroit Free Press, the Houston Chronicle and the Boston Globe. He served as the administrator for the Oakland Activities Association’s website from 2017-2020. Contact him at [email protected] with story ideas for Oakland, Macomb and Wayne counties.
PHOTOS (Top) Deanna Radcliffe, here during the 2025 Division 1 Final, has reached 299 career coaching wins. (Middle) Radcliffe raises the championship trophy after last season’s clincher.
Athletes: Prepare to Beat the Heat
August 4, 2014
By Geoff Kimmerly
Second Half editor
Despite unseasonably cool temperatures this summer in Michigan, high school athletes should prepare for the heat that usually accompanies August and the beginning of Michigan High School Athletic Association fall practices as they kick off next week.
Each year, the MHSAA provides information to its member schools to help them prepare for hot weather practice and game conditions in the late summer and early fall. Football practice can begin August 11, followed by first practices for all other fall sports August 13.
The topic of heat-related injuries receives a lot of attention at this time of year, especially when deaths at the professional, collegiate and interscholastic levels of sport occur, and especially since they are preventable in most cases with the proper precautions. In football, data from the National Federation of State High School Associations shows that nationally 41 high school players died from heat stroke between 1995 and 2013.
Many MHSAA schools this fall are expected to again follow the MHSAA’s Model Policy for Managing Heat & Humidity that directs schools to monitor heat index prior to and during activity and recommends actions based on those readings.
Also this school year, for the first time, the MHSAA is requiring all assistant and subvarsity coaches at the high school level to complete the same rules and risk minimization meeting requirement as high school varsity head coaches, or, in the alternative, one of several online courses designated for this purpose on MHSAA.com.
“It’s not an accident that causes severe heat illness and death. It’s a lack of attention to what should’ve been taking place, a lack of preparation,” said John E. “Jack” Roberts, executive director of the MHSAA. “We’re trying to communicate to our constituents that if we make the precautions that we should, plan as we should, we will have none of these tragedies in school sports.”
The MHSAA Representative Council adopted in 2013 the Model Policy for Managing Heat & Humidity that, while not mandated for member schools, has been adopted by many at the local level. The plan directs schools to begin monitoring the heat index at the activity site once the air temperature reaches 80 degrees and provides recommendations when the heat index reaches certain points, including ceasing activities when it rises above 104 degrees.
The model policy is outlined in a number of places, including the publication Heat Ways, which is available for download from the MHSAA Website. Heat Ways not only provides the model policy, but addresses the need for proper acclimatization in hot weather.
Heat, hydration and acclimatization also are again focuses of the MHSAA’s required preseason rules meetings for coaches and officials. The online presentation discusses the need for good hydration in sports, regardless of the activity or time of year.
The Health & Safety Resources page of the MHSAA Website has a number of links to different publications and information and a free online presentation from the National Federation of State High School Associations. Visit MHSAA.com, click on “Schools” and then on “Health & Safety Resources” to find the information.
Roberts said the first days of formal practices in hot weather should be more for heat acclimatization than the conditioning of athletes, and that practices in such conditions need planning to become longer and more strenuous over a gradual progression of time.
He added schools also must consider moving practices to different times of day, different locations, or change practice plans to include different activities depending on the conditions.
“I think all schools need to prepare themselves in these ways,” Roberts said. “They need to educate participants, parents and coaches about proper hydration and the dangers of practicing and competing when the heat and humidity are too high.”