YANKEES RUN INTO A DEFEAT

The evening was nothing more than a series of disasters for the Yankees. In the end, they were left with an embarrassing 6-5, 11-inning loss to the Chicago White Sox, but also with the memory of two base runners thrown out at home plate on the same play.

The defeat was the Yankees' 9th in their last 12 games, knocking them nine and a half games out of first place in the American League East -their greatest deficit since opening day.

The bizarre night was also marked by a closed-door team meeting with George Steinbrenner before the game and the dismissal of Mark Connor, the pitching coach, who was replaced by Bill Monbouquette. Manager Billy Martin said the move was not his idea. Connor will be reassigned in the organization.

This loss left Martin livid. After spending four nights in an Arlington (Tex.) hospital because of a partially collapsed lung, he returned to see his club pull a blunder on the bases in the seventh inning that probably cost them the game.

''We should've won that game,'' Martin said in the grim aftermath. ''We should've won it in nine innings.''

Instead, they needed a dramatic two-run homer from Dave Winfield in the bottom of the 10th just to prolong their misery.