The Boston Red Sox clinched the AL East title on Friday night, getting seven strong innings from Jon Lester to beat the Toronto Blue Jays 6-3 and eliminate Tampa Bay from the division race.

One night after securing their first playoff appearance since 2009, the Red Sox added their first division title since 2007.

Lester (15-8), from Puyallup, allowed one run on five hits and two walks, striking out eight to win for the seventh time in nine decisions. It was his 100th career victory.

Dustin Pedroia had three hits for the Red Sox, who have won 19 of their last 25.

Pettitte set to retire

Andy Pettitte had no interest in a farewell tour or some big pronouncement regarding his second retirement. Anything more than a conference call the day after the season would only feel embarrassing.

“Because I’ve done this before,” said a sheepish Pettitte, who briefly stepped away from baseball two years ago.

So after discussing it with several close friends — including Mariano Rivera over lunch in Toronto — Pettitte chose to formally announce his decision at a Yankee Stadium news conference Friday. The 41-year-old left-hander initially retired after the 2010 season, but sat out only one year before returning to the Yankees.

A three-time All-Star, Pettitte has helped New York to seven AL pennants and five World Series championships during 15 seasons in pinstripes. He was the MVP of the 2001 AL Championship Series and is the franchise leader in career strikeouts with 2,009.