MILWAUKEE — Sal Frelick tied the score with his first home run in three months, Cooper Pratt hit a go-ahead single in the seventh inning and the Milwaukee Brewers stunned the Tampa Bay Rays 5-4 on Saturday night for a 2-0 World Series lead by overcoming a four-run deficit for the second time this postseason.

Tampa Bay, which won the American League pennant by forcing opponents into mistakes, committed one error, made two other misplays on defense and had a runner thrown out at the plate.

Down 4-0 in the first inning, Milwaukee rallied for its seventh comeback win of this postseason. The Brewers also rebounded from a 4-0 deficit to beat the Los Angeles Dodgers 6-4 in Game 4 of the National League Championship Series, completing a four-game sweep.

“As long as there’s game left, we have a chance. I think we’ve all bought into that.…