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With the indoor track and field season now heading into the final stretch, it's the perfect time to update the COROS MileSplit50 Boys Individual Indoor Track and Field Rankings. These rankings provide an exclusive look at the nation's top athletes, highlighting those who have made their mark this season.
Leading the charge is record-setting underclassman Cooper Lutkenhaus, the only underclassman in the top 25. However, one of the most exciting storylines is the emergence of the five newcomers who have broken into the rankings. Their performances have been nothing short of impressive, proving their mettle this indoor season.
As we head toward the finish, these emerging stars will be ones to watch, setting the stage for what could be the next wave of national champions.
Below, you can find what makes these underclassmen so special.
UPDATED RANKINGS:
COROS MILESPLIT50
Boys Individual Indoor Track & Field Rankings
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A Closer Look at the COROS MS50 Rankings (From Unranked to Ranked)
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8. Josiah Tostenson, Crater (OR)
Josiah Tostenson continues to build on his legacy as one of the top distance runners in U.S. high school history. At the BU Terrier DMR Challenge, the national record holder over 3000m added another milestone to his growing resume, running 3:57.47 to become the second-fastest prep miler of all time.
Despite the national record being broken at the same meet, Tostenson still ran under the previous indoor mark of 3:57.66 set by Hobbs Kessler in 2021. He is now just one of 9 boys to break the 4:00 minute mile mark indoors and one of just four under 3:58. His performance was part of a historic night for Crater (Ore.), as his teammate Tayvon Kitchen also broke 4:00 in the same race-making them the first high school teammates to achieve that feat.
Tostenson now finds himself in elite company, with only Alan Webb, Jim Ryun, and Colin Sahlman having run faster in the mile as high schoolers. But his dominance extends beyond just one event. Over 3000m, he ranks No. 4 all-time, trailing Kitchen and Newbury Park's Lex and Leo Young.
With the indoor season still underway, Tostenson isn't done yet. As he continues to chase history, all eyes will be on what he can accomplish next before heading to the University of Washington this fall.
11. Jackson Cantwell, Nixa (MO)
One meet, one event, and Jackson Cantwell has already made history.
The Nixa junior made his highly anticipated indoor debut at the Northwest Missouri State Bearcat Open #3, and he wasted no time cementing himself as the nation's top thrower. Cantwell unleashed a monstrous 21.89m (71-9.75) throw in the shot put, not only securing the U.S. No. 1 mark by more than five feet but also placing himself among the all-time greats.
With that throw, Cantwell became just the 12th high school boy in history to break the 70-foot barrier indoors. His mark is the biggest seen in eight years, dating back to Adrian Piperi's 72-5 in 2017. And while his indoor career is just beginning, Cantwell has already shattered Missouri's state record by over seven feet.
A dominant force in both track and football, Cantwell is proving to be a generational talent. His debut mark ranks No. 6 in U.S. history, and with more competitions ahead, the junior class national record - and potentially even the overall indoor national record of 77-2.75, set by Ryan Crouser- is within reach. With his indoor and outdoor seasons mapped out, all eyes will be on Cantwell as he continues to push the limits of high school shot putting.
17. Luke Beattie, Warwick Valley (N.Y.)
Luke Beattie soared to new heights at the Section 9 State Qualifier, delivering a career-best performance that placed him among the best high school pole vaulters in history. The Warwick Valley junior cleared 17' 7", a staggering 5.5-inch personal best, making him this season's U.S. No. 1 at the time and tying him for the 12th-best mark in indoor history.
However, Beattie's reign as the national leader was short-lived, as Victor Oleson surpassed his mark later that same day at the Ocean Breeze Elite Invitational with a vault of 17' 7.5". Despite being edged out for the top spot, Beattie's clearance solidified his place among the elite.
Only a junior, Beattie now ranks tied for fourth all-time in the indoor pole vault for U.S. juniors, trailing only Oleson (17' 7.5"), Maddox Hamm (18' 0.5"), and Mondo Duplantis (19' 1"). His vault was only the second time he had ever surpassed 17 feet in competition, marking a major breakthrough in his development. As the season continues, he has firmly established himself as a national contender. With momentum on his side, the question now is just how high he can go.
20. Nicholas Altheimer, Washington (WA)
The uncommitted senior has made one of the most impressive leaps of the season, turning heads with his explosive performances at the STCU West Coast Championships. Altheimer has not just improved - he has completely rewritten his own expectations, emerging as one of the nation's top sprinters with a pair of statement wins.
Coming into the season, Altheimer's indoor 200m personal best was 22.71, a solid mark but far from national contention. Fast forward to the STCU West Coast Championships, and he obliterated that time, clocking a blistering 21.39 to take the win by just one-hundredth of a second. That time now ranks as the No. 2 performance in state history and the 17th-fastest in the country this season.
His progress in the 60m dash has been even more staggering. In January, his season-best sat at 6.90- fast, but not yet elite. But at the West Coast Championships, he dropped a jaw-dropping 6.64 in the preliminaries, making him the first sprinter in the U.S. this season to break 6.65. That time ties him for the 14th-fastest in indoor history and, when converted to a 55m dash (6.19), it would rank as the fastest time in the country this season and tied for the 11th-best mark of all time.
Altheimer's rise has been nothing short of extraordinary. In just a few months, he has gone from a promising sprinter to a national-caliber talent. With the outdoor season on the horizon, all signs point to even bigger things ahead for one of the top uncommitted seniors in the country.