Pierzynski singled in the eventual winning run in the seventh inning and Paul Konerko added another RBI single to make it 5-3.
Freddy Garcia (2-2) got the win with three runs on seven hits and a walk in six innings. Bobby Jenks picked up his 29th save.
Ken Griffey Jr. had a solo home run for the Mariners, who have lost seven of their last nine. Shawn Kelly (4-3) took the loss in relief of Ian Snell, who lasted six innings and gave up two runs on five hits.
Copyright 2009 by United Press International.