I noticed this a couple days ago but forgot to write it down. I
finally found it again.
On list 349, Most Grand Slams by one Team in a Game, Manny Ramirez is
credited with both Indian grand slams on September 24, 1999. Manny
never hit two in one game. He did have a slam and a 3-run homer in
this game but the other Indian slam was hit by Dave Roberts.