In 1966, there were 5 such cards, all within the first 300 cards:
Astros
Giants
Phillies
Pirates
White Sox
In the later series, multi-player cards just disappeared.
In 1967, that number grew to 13 cards, but only for 11 teams:
Braves
Cardinals
Giants
Mets
Phillies
Pirates
Indians (2)
Orioles (2)
Tigers
Twins
White Sox
In 1968, Topps cut way back to just 3 cards (all in the 6th series):
Orioles
Stars from multiple teams (2)
In 1969, there were 4 such cards, again all in the 6th series (it's as though Topps waited until they were sure they wouldn't need a 5th Royals Rookies card!)
Giants
Orioles
Senators
Athletics
(I first discovered these baseball card blogs last September, when I stumbled upon PackAddict's 1969 Athletics' card shown in the above link.)
I previously posted the Giants' multi-player card. Here are the rest:







