  In our solar system massive outer planets dominate in terms of both mass and
angular momentum, but few such planets are among the more than 4000 currently
confirmed exoplanets, and none of these have accurately determined densities.
Here I examine the detection rate of single-transit events anticipated from the
LSST deep drilling fields for such planets with periods of 2 - 25 years. Using
conservative detection criteria, I anticipate 3-30 such detections over the
10-year period of the project, though distinguishing detections from false
positives may prove challenging. However, these few detections are likely to be
of great value in understanding the formation, dynamics, and diversity of
exoplanet systems.
