The CDF Collaboration has studied the process ttbar -> WbWbbar,
where WbWbbar decays into the lepton + jets or all-hadronic channel.  In the
lepton + jets channel, distributions of various kinematical quantities are
found to agree well with Monte Carlo predictions based on the Standard Model.
Kinematical techniques to select ttbar candidate events are being refined.
In the all-hadronic channel, considerable progress has been made in
identifying a top signal, and in measuring the corresponding top mass.