Matthew Schaefer’s unprecedented rookie campaign as the New York Islanders’ top-pair defenseman has driven the overwhelming trader consensus for the 2025-26 Calder Memorial Trophy. The 18-year-old No. 1 overall pick posted 59 points in 82 games, setting the NHL record for goals by a rookie defenseman while leading all first-year players in ice time, power-play tallies, and shots. His combination of offensive production, defensive reliability, and record-setting minutes has left little room for other candidates in the Professional Hockey Writers’ Association voting. Late-season roster stability and the absence of any significant injuries further solidified his position, though an unforeseen late scratch or a dramatic surge by a fellow rookie could have introduced minor volatility into the final ballots.