The 2026 National League Rookie of the Year market has narrowed into a two-man race between Cardinals second baseman JJ Wetherholt and Reds first baseman Sal Stewart, with Mets outfielder Carson Benge third and a long tail of 30 more names behind. The board carries roughly $3.4M in cumulative volume across Kalshi and Polymarket. The live board above ranks all 33 priced contenders; the BBWAA announces the winner in November 2026, after the regular season ends September 27, 2026.
Six weeks of regular season remain and the 2026 NL Rookie of the Year board has consolidated into a two-name market. JJ Wetherholt and Sal Stewart now absorb better than 90c of the combined board, Carson Benge holds third, and everything else trades in low single digits or less. Konnor Griffin and Bryce Eldridge, both priced as top-tier contenders in the spring, have slid to the bottom of the ladder. With 33 priced contenders and roughly $3.4M in cumulative volume across Kalshi and Polymarket, this is one of the deepest award markets on the baseball board. The live board above carries current prices on every name; the sections below cover the shape of the race and what moves it.
Wetherholt is the chalk at roughly 60c. Through 120 games for the Cardinals he is hitting .244/.349/.375 with 16 home runs, 46 RBI, 13 stolen bases and 81 runs scored, and the on-base line is the load-bearing number: 62 walks against 85 strikeouts put his OBP more than 100 points above his batting average. He plays second base every day, which is the other half of the case. The award rewards a full season of at-bats from an up-the-middle regular, and Wetherholt has 542 plate appearances on a 64-62 St. Louis club with no reason to rest him. The risk is the risk every rookie favorite carries. This is a counting-stats award, so any injury or lineup demotion over the final six weeks reprices him immediately.
Stewart is the structural argument against the favorite. The Cincinnati first baseman leads Wetherholt in nearly every counting category a voter reads first: 26 home runs to 16, 91 RBI to 46, a .473 slugging mark to .375, and an .806 OPS to .724 across 125 games. He trades at roughly half Wetherholt's price. That gap is a positional discount, not a pricing error. Stewart plays first base, the least valuable spot on the defensive spectrum, and his .333 OBP trails Wetherholt's .349 despite the power edge. Voters who weight defensive position and plate discipline land on Wetherholt. Voters who read the back of the baseball card land on Stewart. Both play in the NL Central, where Milwaukee at 77-48 and Chicago at 73-53 have separated from the Cardinals and Reds on the 2026 NL Central division odds, so neither leader gets an October showcase to close on. Stewart's home run pace is the single fact most likely to move this board before September 27.
Benge holds third in high single digits with the most complete season below the top two: .273/.335/.415 with 14 home runs, 18 stolen bases and 49 RBI in 120 games. He plays for a Mets team that is 57-69 and out of the race, which does not disqualify a rookie candidate but does remove the September attention that usually separates a second-place finisher from a third.
Nolan McLean is the most interesting name under him and the one contract where the two books disagree in proportion. The Mets right-hander has made 25 starts with a 3.34 ERA, 162 strikeouts and a 1.16 WHIP over 142.2 innings, and he kept rookie eligibility by two innings: he threw 48.0 innings in 2025, just under the 50-inning threshold that ends rookie status. Kalshi prices him at 5c and Polymarket at 1c. That is a small absolute gap on a thin contract, and it reflects how differently the two platforms weight a starting pitcher in an award decided by full-season volume.
The names that carried the June board have fallen out. Eldridge has 13 home runs and a .775 OPS but only 81 games for a 51-73 Giants club. Griffin, a 20-year-old shortstop hitting .276 with 20 stolen bases, has appeared in just 59 of Pittsburgh's 127 games, and that playing-time shortfall is the entire story of his repricing. Below them sit more than two dozen names at a cent or less. Those are lottery tickets on a September promotion, and they are why this board keeps trading long after the top of it has settled.
The 2026 regular season ends September 27, 2026. The Baseball Writers' Association of America announces the National League Rookie of the Year in November 2026, and the contracts on this board carry a platform settlement date of December 19, 2026, which is the backstop rather than the announcement date. Each player contract pays out if that player is named the winner and resolves to zero otherwise. Eligibility follows MLB's standard rookie thresholds: fewer than 130 prior major-league at-bats for position players, fewer than 50 prior innings pitched for pitchers, and fewer than 45 days on an active roster before September 1 of a prior season.
For the parallel race in the other league, see the 2026 AL Rookie of the Year odds. The two biggest individual National League prizes trade on their own boards: the 2026 NL MVP market and the 2026 NL Cy Young odds. Team futures for the same clubs run through the 2026 NL Pennant market. Browse the full slate of season awards, division futures and daily game boards on the MLB hub. The live board above stays current across Kalshi and Polymarket as the race develops.
Resolves to the player named the 2026 National League Rookie of the Year by the Baseball Writers' Association of America, announced in November 2026 after the regular season ends September 27, 2026. The contracts on this board carry a platform settlement date of December 19, 2026, which is the backstop rather than the announcement date. Each player contract pays $1 per share if that player wins the award; all other player contracts resolve to $0. Eligibility follows MLB rookie thresholds of fewer than 130 prior major-league at-bats for position players, fewer than 50 prior innings pitched for pitchers, and fewer than 45 days on an active roster before September 1 of a prior season. Ties or co-winners settle per each platform's stated rules, and the market voids per platform rules only if the award is not issued.
JJ Wetherholt is the favorite at roughly 60c, with Sal Stewart second near 31c and Carson Benge third in high single digits. The live board above ranks all 33 priced contenders across Kalshi and Polymarket.
The Baseball Writers' Association of America announces the award in November 2026, after the regular season ends September 27, 2026. The contracts carry a platform settlement date of December 19, 2026.
Both Kalshi and Polymarket list the award, with roughly $3.4M in cumulative cross-platform volume across 33 priced names. The board above compares both books on every contender.
JJ Wetherholt of the Cardinals leads the board. He is hitting .244/.349/.375 with 16 home runs, 62 walks, 13 stolen bases and 81 runs scored in 120 games while playing second base every day.
Watch Sal Stewart's home run pace, at 26 through 125 games against Wetherholt's 16, and watch playing time for both. Six weeks remain before the September 27, 2026 finale, and a September call-up from the sub-1c tail is the fastest way this board reorders.