This pullover is knit from the bottom up with knitted-in underarm gussets. The upper chest front and back pieces are divided at the midpoint of the gusset and knit flat separately. Once the upper body is complete, the shoulders are joined with 3-needle bind off. Then the sleeves are knit from the top down from the end of the shoulder join to the ribbed cuff. The collar is knit in the round after the upper body pieces are joined.

Pattern tested and tech edited.