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Pete Rose played 95 games of the 1984 season with the Expos
Vladimir Guerrero
If I understand the question correctly, no one who played in the Expos inaugural game in 1969 played in the Blue Jays inaugural game in 1977.
Wilton Guerrero played in 5 games at designated hitter for the Montreal Expos in 1999, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Orlando Merced played in 2 games at designated hitter for the Montreal Expos in 1999, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Wilton Guerrero played in 6 games at designated hitter for the Montreal Expos in 2000, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Matthew Cepicky played in 2 games at designated hitter for the Montreal Expos in 2004, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Carl Everett played in 3 games at designated hitter for the Montreal Expos in 2004, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Jose Vidro played in 4 games at designated hitter for the Montreal Expos in 2004, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Ryan McGuire played in 3 games at designated hitter for the Montreal Expos in 1997, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Sherman Obando played in 2 games at designated hitter for the Montreal Expos in 1997, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Andy Stankiewicz played in 2 games at designated hitter for the Montreal Expos in 1997, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).