A winner of pocket billiard championships, in Nine-ball, Eight-ball and Straight Pool.

[1] He accumulated many tournament wins in the 1970s throughout the United States, Asia and Europe, thus acquiring the nickname "King James".

[1][3] In 1979, Rempe went to Australia where he defeated World Snooker Championship finalist Eddie Charlton in a series of Nine-ball, Rotation, and Straight Pool.

In December 2005, Rempe participated in the International Pool Tour IPT King of the Hill Shootout, an invitational event consisting of thirteen BCA Hall of Famers and thirty other accomplished players, in Orlando, Florida.

In 1985 Rempe turned professional, achieving his best result in 1987, when he reached the round of 64 during the 1987 World Snooker Championship.