What is the record for most home runs in a game by a team?

Answer 1

The Blue Jays went deep ten times at home against the Orioles on 14-Sept-1987 -- three by Whitt, two each by Bell and Mulliniks, and one each by Moseby, Ducey, and McGriff.

Hart had one for the O's, making for eleven in the game.

Box: http://www.retrosheet.org/boxesetc/1987/B09140TOR1987.htm

Answer 2

10 Sept 14, 1987, by Toronto vs Baltimore at Toronto.

In fact, there was also an Orioles HR,which tied the record for homers by both teams in an MLB game.

You would think otherwise, but the most remarkable part about that game was that with all of those homers being hit, no batter was hit in retaliation.

This was also the game that saw the end of Cal Ripken Jr's consecutive innings streak. Senior pulled him for Ron Washington (Yes, THAT Ron Washington) after the 7th.

Answer 3

10 - Blue Jays