He also reached the quarterfinals of the 1985 Australian Open in doubles knocking out the 3rd seeded team of Tomáš Šmíd and John Fitzgerald in the second round.

The 1982 U.S. National Champion for boys 18 & under, Letts received a full scholarship to Stanford University, where he was a two-time All-American and member of two NCAA championship teams.

At Stanford, he partnered with three doubles players who later reached the top five in the world: Scott Davis, Jim Grabb, and Patrick McEnroe.

244 in the world in singles achieving most of his success on the ATP Challenger Tour including the semifinals of Manchester (1989) and San Luis Potosí (1988) and the quarterfinals of Nagoya (1988) and Dublin (1989).

In Grand Slam singles, he reached the second round of the 1987 Australian Open before losing to eventual champion Stefan Edberg in four sets.