NEW YORK (AP) _ The threatened walkout by major league umpires collapsed Tuesday, with all umps withdrawing their resignations, The Associated Press has learned.

However, it appears that one-third of the 68 major league umpires may lose their jobs, anyway, because the American and National leagues already have hired 25 replacements from the minor leagues.

AL president Gene Budig sent letters to nine AL umpires on Monday accepting their resignations, according to one high-ranking baseball official who spoke on the condition he not be identified.

Similar letters to as many as 13 NL umps will be sent by NL president Len Coleman, the official said.