Richard Dysart best known for Leland McKenzie in `` L.A. Law '' Dysart had many TV and film roles , including spots in `` Being There '' and `` The Thing '' Actor won Drama Desk award for performance in theatrical `` That Championship Season
Richard Dysart best known for Leland McKenzie in `` L.A. Law '' Dysart had many TV and film roles , including spots in `` Being There '' and `` The Thing '' Actor won Drama Desk award for performance in theatrical `` That Championship Season ''