It was the eighth walkoff win of the season for the Red Sox, who twice faced four-run deficits before tying the contest with a big sixth inning.

Wily Mo Pena finished the day with three hits, including a fifth inning homer, three RBI and three runs scored, while light hitting Doug Mirabelli also drove in three runs.

In Chicago, Brian Anderson drove in a pair of runs and the White Sox took advantage of a pair of Detroit errors to fashion a 4-3 comeback win that sent the slumping Tigers to their fourth straight defeat.

As a result of their tailspin, the surprising Tigers have seen their 10-game lead in the AL central trimmed to 6 ? by the World Series champions.

With six wins in their last nine, the White Sox also continue to set the pace in the AL wild card race.

Tied 3-3 entering the seventh, Sandy Alomar sent a sacrifice fly to right field scoring Jermaine Dye with the go-ahead run.