La Russa told reporters Monday crowd noise prevented the Cardinals' bullpen coach from understanding his order to warm up Motte in the eighth inning as the Rangers were mounting a rally that ultimately resulted in Monday's 4-2 Texas victory for a 3-2 World Series lead.
Instead, reliever Lance Lynn -- who wasn't scheduled to pitch Monday -- was warmed up, forcing La Russa to leave left-handed setup man Marc Rzepczynski in the game to face the hot right-handed Texas hitter Mike Napoli.
Napoli proceeded to bash a tiebreaking double, sealing the Rangers' victory.
"They heard 'Rzepczynski' and they didn't hear 'Motte,' and when I looked up there, Motte wasn't going," La Russa told The St. Louis Post-Dispatch.
"(Later) I called back and said 'Motte,' and they heard 'Lynn.' So I went out there, wrong guy. (Lynn) is not going to pitch today. ... That's why -- it must be loud. I give the fans credit."