What are the 6 ways to reach 1st base without recording an at bat?

A player can reach first base without an official at-bat in several ways: by being hit by a pitch, receiving a walk (base on balls), or if the opposing team commits a fielding error. Additionally, a player can reach first on a fielder's choice if the defense opts to put out another runner, and via interference or obstruction by a defensive player. Lastly, if a player is awarded first base due to a catcher's interference, they also reach first without an at-bat.