As the 2026 MLB season progresses into week four, the first basemen rankings showcase impressive performances. Ben Rice of the New York Yankees tops the list, continuing his hot start with a potential to break his previous season's record of 26 home runs. Sal Stewart from the Cincinnati Reds is making waves as the best rookie in the National League, positioning himself as a frontrunner for the NL Rookie of the Year. Matt Olson of the Atlanta Braves is also having a stellar season, keeping his team competitive. Other notable mentions include Willson Contreras of the Boston Red Sox, who is excelling in his first season with the team, and Christian Walker of the Houston Astros, who aims to hit 30 home runs this year. The rankings reflect the players' contributions and their potential impact on their respective teams as the season unfolds.