I think Bo Jackson was the first to both at the same time, although others before him had switched from one league to the other.
minnie minoso
The team they last played with
good
Yes he was
An MLB Debut is when a player makes his first appearance onto the field or at the plate
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5
One April 15, all players, coaches, and umpires of the MLB wear the jersey number 42 in honor of Jackie Robinson, the first African American MLB player, who played his first MLB game on April 15, 1947.
One MLB player who played and managed at the same time was Pete Rose. He played as a player-manager for the Cincinnati Reds from 1984-1986. Another example is Frank Robinson, who played as a player-manager for the Cleveland Indians from 1975-1977.
Delmon Young
Joe Mauer
Darin Erstad.