UPDATED, BELOW
The New York Yankees lost to the Detroit Tigers yesterday by a score of 0-16. The loss left the Yankees 8 games behind the Boston Red Sox with 31 games remaining. It looks bad for the Yankees. But -- although "past performance is no indication of future returns," as they say in the mutual-fund business -- let's look at the Yankees' regular-season record for the 12 seasons of Joe Torre's managership. The first half of each entry describes the Yankees' record after 131 games; the second half describes the Yankees' record at the end of the regular season.
1996 -- 74-57 (.565),4 games ahead of Baltimore; 92-60 (.568), 4 games ahead of Baltimore
1997 -- 78-53 (.595), 7 games behind Baltimore; 96-66 (.593), 2 games behind Baltimore
1998 -- 95-36 (.725), 16.5 games ahead of Boston; 114-48 (.704), 22 games ahead of Boston
1999 -- 81-50 (.618), 7.5 games ahead of Boston; 98-64 (.605), 4 games ahead of Boston
2000 -- 75-56 (.573), 5 games ahead of Boston; 87-74 (.540), 2.5 games ahead of Boston
2001 -- 76-55 (.580), 4 games ahead of Boston; 95-65 (.593), 13.5 games ahead of Boston
2002 -- 83-48 (.634), 9 games ahead of Boston; 103-58 (.640), 10.5 games ahead of Boston
2003 -- 80-51 (.611), 4 games ahead of Boston; 101-61 (.623), 6 games ahead of Boston
2004 -- 81-50 (.618), 3.5 games ahead of Boston; 101-61 (.623), 3 games ahead of Boston
2005 -- 75-57 (.568), 2.5 games behind Boston; 95-67 (.586), same record as Boston (New York awarded division championship for winning season series against Boston)
2006 -- 78-53 (.595), 8 games ahead of Boston; 97-65 (.599), 10 games ahead of Toronto (Boston finished third, 11 games behind New York)
2007 -- 72-59 (.550), 8 games behind Boston; ???
In sum, the Yankees of 2007 not only are not the Yankees of Torre's past, but the Yankees of Torre's past also had little come-from-behind experience this late in the season. I now believe that the Yankees might not win the American League East championship. I come to that tentative view by considering the Yankees' performance -- in this season and recent seasons -- not by playing mindless "what if" arithmetic games. (For more on that, see this.)
UPDATE (08/30/07): Well, maybe the Yankees aren't in meltdown. They just swept three games from the Red Sox and are now "only" five games back, with 28 games left in the regular season. The Yankees-Red Sox three-game series (September 14-16) at Fenway Park could be decisive -- if the Yanks don't slip badly between now and then.