Of the 409 homeruns Manny Ramirez has hit in his career, 19 of them have been hit with the bases loaded. According to Baseball Musings, this puts him close enough to be a threat to Lou Gehrig’s record of 23 career grand slams.
If he can stay healthy, something that the Iron Horse wasn’t afforded, this is definitely a possibility.
Check out Baseball Musings’ nifty year-by-year chart.