The following is a list of annual leaders in assists in Major League Baseball (MLB), with separate lists for the American League and the National League. The list also includes several professional leagues and associations that were never part of MLB. Rabbit Maranville is the all-time leader in assists with 8,967. Frankie Frisch holds the record for most assists in a season with 643 in 1927. Marcus Semien is the active leader in assists and has led the league 4 times.