Keeler Approaching Milestone Win Amid Final Season of Legendary Tri-unity Career
By
Dean Holzwarth
Special for MHSAA.com
December 18, 2024
WYOMING – Mark Keeler has spent four decades coaching boys basketball at Tri-unity Christian High School.
And while he has many stories that he shares often, one of his favorites comes from the beginnings of the program.
“We didn't have bleachers in our gym when I first started,” Keeler said. “I would make my boys set several rows of chairs up so people could watch our games. And then they eventually added bleachers that were donated by the church.”
Keeler’s teams have been filling up the bleachers since he took the reins for the 1983-84 season, and he has built the program into one of the most successful in the state.
Now, as he leads his team through the opening month of his 38th and final campaign, Keeler is nearing a rare milestone only achieved by a few. He is expected to soon become the fourth coach in MHSAA history to reach 700 wins.
Tri-unity is 3-1 this winter, making Keeler a combined 697-217 coaching the Defenders. Roy Johnston is the winningest coach in state boys basketball history with 833 victories earned during stints at Yale, Howell and Beaverton before retiring in March. He is followed by longtime River Rouge coach Lofton Greene (728) and Clarkston’s Dan Fife (703).
“It's a statement of longevity with these men,” Keeler said. “All three of them were very successful at the schools they were at and most of them spent a long time at one school, just like I’m doing now. I’ve never coached anywhere but Tri-unity, and that is quite a privilege to have been a part of this school.”
Keeler reached 697 wins with last week’s nonconference victory over Wyoming Kelloggsville and can move closer to the milestone with another Friday night against Grandville Calvin Christian. The Defenders then play East Grand Rapids and Grand Rapids West Catholic, respectively, at the Cornerstone University Holiday Classic at the end of the month.
Keeler, who retired from a 40-year teaching career two years ago, started coaching in 1983-84 when Tri-unity had only an eighth and ninth-grade team. After two seasons of playing subvarsity, the school formed its varsity team for the start of the 1985-86 season, with Keeler at the helm. After three seasons with the varsity, he took a break from coaching (but continued teaching and serving as athletic director).
“I had to get my priorities right with the Lord,” Keeler said. “I was trying to do too much and lost focus, and it was something that needed to be done. I look back, and it was something that set me up for the rest of my coaching career.”
Keeler returned for the 1990-91 season and has been at the forefront ever since. He has guided the Defenders to six state championships, including last year’s with a victory over Mount Pleasant Sacred Heart in the Division 4 Final. Tri-unity also has won titles in 1996, 2002, 2006, 2011 and 2022, while finishing as Finals runner-up six times.
Keeler’s teams also have reached the Semifinals 15 times, won 19 Regional championships, 26 District titles and 22 conference championships. His players have filled Class D and Division 4 all-state teams for years, with surely the best-known 2000 grad Chris Kaman – who went on to play at Central Michigan and 13 seasons in the NBA – and Brandon Voorhees, who led Tri-unity to the 2002 title as a senior, went on to CMU and then Park University in Missouri, and played professionally overseas.
“I’m so glad that I’ve been able to just be here this long,” said Keeler, who was inducted into the Basketball Coaches Association of Michigan Hall of Fame in 2016. “I love Tri-unity. My wife taught there, we met there, and my daughters went all the way through and graduated from there, so it's always been a part of my life. There's been so many quality people that have been there along the way.
“I've been very blessed to have had so many quality players and parents and coaches. It’s amazing when I look back at all those that have been a part of the program.”
Keeler, a man with a strong Christian faith, could’ve gone elsewhere during his career, but believed he had a calling at Tri-unity.
“I've had some opportunities to move on and go to different places, but whenever I prayed about it I always thought that this is where the Lord wanted me and that's always my priority,” Keeler said. “I want to please him first, because as a Christian that's my priority. I just thought this is where he placed me, so I’m going to set roots and do the best I can.”
Tri-unity senior guard Keaton Blanker, one of two returning starters on this year’s team, is excited to see his coach reach such a prestigious milestone.
“It’s the perfect scenario for him with this being his last year and getting to 700 wins,” Blanker said. “He’s going to leave his mark, and it’s well deserved. Being a small Division 4 school, he’s helped to put the program on the map and I remember growing up and watching his teams win state titles. I was waiting for the opportunity to play for him so I could help do the same thing.”
While Keeler is grateful for the unbridled success of the program on the court, creating lasting relationships with his players off the court and helping them grow in their faith has been equally gratifying.
“I know without a doubt that the Lord has blessed our program.” Keeler said. “There are a lot of great coaches out there that are probably better at Xs and Os than I am, but I think I’m a strong motivator and build good relationships with the players and get to know them.
“I let each player know that I want them to grow in their walk with the Lord, and that's where my priority is. To be an influence toward Christ, not away from Christ.”
Past Tri-unity standout Brent Voorhees, who has been Keeler’s assistant coach the last several years and will succeed him next season, said Keeler has never changed his approach to the game.
“Coming back to coach with him, the one thing that stands out is he doesn't waver on his principles,” Voorhees said. “A lot has changed in the sport in terms of analytics and how coaches attack things, but he has definitely stayed firm in his approach that it’s defense first and he preaches the team aspect. It’s never about an individual.
“He doesn’t let anything off the court distract him from goals. He's really good at keeping the goal in front of the guys. He keeps them focused on the goal of winning state championships and also becoming great, young Christian men in the community, which is what he stands for and always comes first.”
The Defenders graduated eight players from last year’s team, but Blanker and senior Joey Mellon are back with several newcomers as they bid to send Keeler out with one more title at Breslin Center.
“I enjoy putting them together and getting them to mesh as a team,” Keeler said. “For me, I have learned that defense wins championships. The old adage that offense wins games, but defense wins championships ... I so believe that with all my heart.”
Reporter Dean Holzwarth, a longtime member of the West Michigan media, is also the junior varsity head coach and a varsity assistant for the Tri-unity Christian boys basketball program.
Dean Holzwarth has covered primarily high school sports for Grand Rapids-based WOOD-TV for five years after serving at the Grand Rapids Press and MLive for 16 years along with shorter stints at the Ionia Sentinel and WZZM. Contact him at [email protected] with story ideas for Allegan, Kent and Ottawa counties.
PHOTOS (Top) Surrounded by celebrating players and assistant coaches (including the author, far right), Tri-unity boys basketball coach Mark Keeler (hand in pocket) enjoys a moment near the end of last season’s Division 4 championship game. (Middle) Keeler, middle, huddles with his team during the 1997 run to Breslin, when the Defenders finished Class D runners-up. (Below) Keeler raises the 2002 Class D championship trophy to the cheers of Tri-unity’s supporters. (MHSAA file photos.)
Niles' Arnold Remembered as Teacher & Leader, 'Doing Exactly What He was Meant To Do'
By
Scott Hassinger
Special for MHSAA.com
January 13, 2026
NILES – Throughout his 22-year career coaching varsity girls basketball at Niles High School, Jim Arnold required one thing from his players.
Just have fun.
"Jim always stressed to his players that the one thing he wanted them to do when on the floor was to just have fun playing the game," said George Brawley, who served 15 seasons as one of Arnold's assistant coaches at various levels.
Arnold, 81, died Dec. 9 following an extended illness.
But throughout his career, Arnold's teams did much more than just enjoy themselves. The Benton Harbor native built a highly-successful program at Niles, where he achieved an overall win-loss record of 360-139 from 1986-2008, with 19 winning seasons. Under Arnold's watch, the Vikings captured seven conference titles, 10 District championships – including nine straight from 1997-2005 – and five Regional crowns.
Among Arnold's other accomplishments were being named Class B Coach of The Year by The Associated Press in 1998 and receiving honorable mention in 1997, along with selection by the Basketball Coaches Association of Michigan as Region 5 Coach of the Year in 2002 and 2004. He was also named conference Coach of the Year seven times and received the Herb Quade Memorial Sportsmanship Award for the 2002-2003 season.
Arnold also coached Niles to back-to-back District championships in softball in 1993 and 1994.
As young athlete himself, Arnold excelled on the baseball diamond. A successful player while at Benton Harbor, he also played on Twin City American Legion teams and was known as a team captain and a coach on the field. Arnold later had an invitation to try out at the professional level with the Baltimore Orioles, but an injury ended his pursuit of that dream.
Arnold later played third base for Bargain Center, a slow-pitch softball team that won a regional championship and went on to play in the national title game in St. Louis, Mo.
His daughters Sonya and Allison were among the athletes that Arnold mentored during his coaching career. Sonya (Martinez), his oldest daughter, played for her father in eighth grade.
"He made the game fun, and you wanted to do your best because you didn't want to disappoint him. He poured his heart into each and every practice and game because preparation mattered to him. He demanded excellence, and every player became better because of his coaching ability," said Martinez, a 1986 Niles graduate.
Allison (Clay) his youngest daughter, played on the 1990 Niles varsity squad that finished 25-1, winning conference, District and Regional titles. She is a 1991 graduate.
"It was awesome playing for my dad. Some of my best memories in my life were during that time,” Clay said. “He had high standards and inspired others to be the best version of themselves. He put his heart and soul into what he did, and I had a front-row seat to that."
Linda Arnold has fond memories as a coach's wife.
"I loved watching my husband coach because of the joy it brought him. His passion, intensity and the love he had for his players was genuine,” she said. “It was more than a game. It was more about developing players in the area of discipline, teamwork and giving your all. Even in the busiest part of the season, he always made me feel like a priority. I didn't just watch a coach. I watched a man doing exactly what he was meant to do.
"My husband coached with passion, but he loved his family with intention. My girls would go to his practices and we all attended his games, and we had the team over for team dinners. His players were a part of our extended family. He made sure we felt a part. He was the best coach in the world, and he was mine."
Jim Arnold was highly respected by his coaching peers. He was kind and treated everyone with dignity. The community of Niles knew what he stood for and they knew his standards were high. He was admired for his preparation and understanding of the game as well as his commitment to doing things the right way. He was strict but fair and treated everyone the same, whether you were the star player or last one off the bench, Martinez explained.
"Developing his players' character was far more important to him than winning," she said. "Dad lived what he taught. He modeled humility, hard work and lived a life of integrity. He made people better by being a part of their lives."
When Jim Arnold first began his junior high teaching career in Niles, he also coached the boys junior high basketball team. There were no girls basketball teams at the time, so a girl tried out for the boys team. She was good enough to make the team, so Arnold kept her. The following school year, the principal asked Arnold to organize a girls team – and the rest was history.
Former Niles varsity girls basketball coach Jessica Johnson, a teammate of Clay’s, recalls the experience of playing for Coach Arnold.
"Coach Arnold taught us discipline, resilience and always required 110 percent effort from you. He would instill confidence in you while still holding you accountable," said Johnson, now an assistant women’s basketball coach at Southwestern Michigan College.
Johnson recalls Arnold's use of comic strips as a teaching tool to help his players improve upon their mistakes.
"If you had a game where you didn't shoot very well or took questionable shots, he would place pictures of bricks in the gym the day following the game," Johnson said.
"Coach Arnold went out of his way to build that relationship and trust with his players. He gave us lessons that extended way beyond the court that made us better people."
Mark Haase, a Niles alumnus and the current Vikings head varsity boys basketball coach, also had the privilege of playing for Arnold.
"I played freshman basketball for Coach Arnold. It was one of the most disciplined and well-conditioned teams I ever played on. He ran a tight ship, but it was done out of love and concern for his players. He has a great family and is a Niles legend," Haase said.
Niles athletic director Matt Brawley referred to Arnold as an amazing teacher, coach and individual in the school and community.
"Coach Arnold would never ask you to do anything he wouldn't do. He was very structured and expected a lot out of his players, and he got results without excuses,” Brawley said. “He was a true leader of Niles athletics. He was an unbelievably kind and humble individual.”
Scott Hassinger is a contributing sportswriter for Leader Publications and previously served as the sports editor for the Three Rivers Commercial-News from 1994-2022. He can be reached at [email protected] with story ideas for Berrien, Cass, St. Joseph and Branch counties.
PHOTOS (Top) Jim Arnold poses for a photo with his granddaughters following a Niles girls basketball game. (Middle) Arnold signals for a timeout. (Below) Linda and Jim Arnold, seated (middle) take a photo with their daughters and their families. (Photos courtesy of the Niles athletic department and Arnold family.)