Big Papi Bracket: Vote for David Ortiz's greatest moment (Final 4)

— -- How will you best remember Big Papi?

As David Ortiz's final regular season hits its home stretch, we're asking fans to select the Boston Red Sox slugger's signature achievement.

A week ago, we began the Big Papi Bracket with an opening round of 32 moments. Last Thursday, we revealed the Sweet 16. Monday, we moved on to the Elite Eight. Today, it's the Final Four.

And on Monday, the championship round.

All you have to do is vote.

Green Monster Region vs. Pesky Pole Region

No. 1 seed: Oct. 17, 2004 -- With the Red Sox down 3-0 in the American League Championship Series, Ortiz hits a 12th-inning, two-run, walk-off home run against? Paul Quantrill to beat the New York Yankees and spark Boston's historic series comeback.

No. 1 seed: Oct. 13, 2013 -- Ortiz sends Torii Hunter tumbling over the right-field wall at Fenway Park -- and turns a celebrating Boston cop, Steve Horgan, into a celebrity -- with a grand slam that turns the tide in Game 2 of the ALCS against the Detroit Tigers.

The Triangle Region vs. Yawkey Way Region

No. 1 seed: April 20, 2013 -- The only No. 1 seed not in October, but it's a serious contender for the crown nonetheless. Otherwise known as The Speech, Ortiz addresses the Fenway faithful, the city of Boston and the entire country in the wake of the Boston Marathon bombing. "All right, Boston," Big Papi says. "This jersey that we wear today, it doesn't say 'Red Sox.' It says 'Boston.' We want to thank you, Mayor [Thomas] Menino, Governor [Deval] Patrick, the whole police department for the great job that they did this past week. This is our f---ing city. And nobody's going to dictate our freedom. Stay strong."

No. 1 seed: Oct. 18, 2004 -- Down 3-1 in the ALCS (after his walk-off home run in Game 4), Ortiz smacks a two-out, game-winning single in the 14th inning off Yankees reliever Esteban Loaiza to bring Boston within a game of tying the series.