Athletes still do a pretty poor job in commercials in the 21st
century. So as you can probably imagine, in the 1970s, they were
terrible.  This Atari clip from 1978 featured baseball star Pete
Rose, football legend Pelé and...Don Knotts. OK, so Don did just
fine, but he was an actor, not a sportsman.  1978 Atari
Commercial With Pete Rose, Pelé, And Don Knotts [Retroist]