(AP Photo/Steve Nesius)

ST. PETERSBURG, Fla. (AP) With the complicated math of baseball in the wild-card era, players in the Boston clubhouse was unaware the Red Sox are playoff bound.

Dustin Pedroia hit his fourth career grand slam to help Rick Porcello get his major league-leading 22nd win, and the Red Sox clinched a playoff berth by beating the Tampa Bay Rays 6-4 Saturday night for their 10th consecutive win.

Boston maintained a 5 1/2-game lead over Toronto for the division title and ensured no worse than the AL's second wild card. While the Red Sox technically have a magic number of one, the Blue Jays and Baltimore Orioles play each other three times in the season's final week - meaning only one of them can win match Boston's 91 wins.

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