Mr. Fullswing (stylized as Mr.FULLSWING), also known as MisuFuru (ミスフル), is a Japanese baseball-themed manga series written and illustrated by Shinya Suzuki [ja].

It was serialized in Shueisha's Weekly Shōnen Jump magazine from May 2001 to May 2006, with its chapters collected in 24 tankōbon volumes.

The series follows Amakuni Saruno, a loser at attracting girls, perverted and prone to getting into trouble, yet he has great strength of heart and body.

He is accompanied by Kengo Sawamatsu, and the pair work together in order to fulfill Saruno's dream: dating Nagi Torii, Junishi baseball team manager.

Being fed up with seeing all the girls fall in love with high school athletes, he decides to join a sports-club himself.