Bookend Floating

One player managed to be floating in the first and last of the floating head cards.  There were years in-between when the player was not with the Cubs, which is why he doesn't have as many floats as Rick Reuschel.

Describing the bookend floater as a player isn't correct.  The person was a player on the first card and a coach on the last one.

And no, it isn't Ernie Banks.  Mr. Cub floated as player (1971) and a coach (1972) but his coaching time ended in 1973.

The answer is...

...Billy Williams, my all-time favorite player!