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Major League Baseball history is built on moments — swings, pitches, and split-second plays that reshaped seasons and, in some cases, entire franchises. From walk-off home runs in winner-take-all games to clutch hits under October pressure, the biggest plays often came when the stakes were highest. identified the most impactful plays in Philadelphia Phillies history using data from . Plays were ranked by their Championship Win Probability Added (cWPA), a metric that measures how much a single play changed a team's odds of winning the World Series.

#10. October 28, 2022 (WS Gm 1)
- Score: tied 5-5 (10th inning, 0 outs)
- Opponent: HOU
- Event: HR
- Play Description: Home Run (Fly Ball to Deep RF Line)
- cWPA: 10.78%

#9. November 03, 2022 (WS Gm 5)
- Score: down 3-1 (8th inning, 1 out)
- Opponent: HOU
- Event: 1B
- Play Description: Single to RF (Line Drive to Deep CF-RF); N. Castellanos Scores; B. Stott to 3B
- cWPA: 11.94%

#8. November 01, 2009 (WS Gm 4)
- Score: down 4-3 (8th inning, 2 outs)
- Opponent: NYY
- Event: HR
- Play Description: Home Run (Line Drive)
- cWPA: 12.10%

#7. October 12, 1980 (NLCS Gm 5)
- Score: down 5-4 (8th inning, 2 outs)
- Opponent: HOU
- Event: 1B
- Play Description: Single to RF; G. Gross Scores; R. Avilés to 2B
- cWPA: 12.77%

#6. October 19, 1980 (WS Gm 5)
- Score: down 4-3 (9th inning, 2 outs)
- Opponent: KC
- Event: SO
- Play Description: *ENDED GAME*:Strikeout Swinging
- cWPA: 13.52%

#5. October 19, 2009 (NLCS Gm 4)
- Score: down 4-3 (9th inning, 2 outs)
- Opponent: LAD
- Event: 2B
- Play Description: *WALK-OFF*:Double to RF (Line Drive); E. Bruntlett Scores; C. Ruiz Scores
- cWPA: 16.01%

#4. October 19, 1980 (WS Gm 5)
- Score: tied 3-3 (9th inning, 2 outs)
- Opponent: KC
- Event: 1B
- Play Description: Single to P (Line Drive); D. Unser Scores
- cWPA: 16.62%

#3. October 12, 1980 (NLCS Gm 5)
- Score: tied 7-7 (10th inning, 2 outs)
- Opponent: HOU
- Event: 2B
- Play Description: Double to CF; D. Unser Scores
- cWPA: 18.03%

#2. October 19, 1980 (WS Gm 5)
- Score: down 3-2 (9th inning, 0 outs)
- Opponent: KC
- Event: 2B
- Play Description: Double to RF (RF Line); M. Schmidt Scores
- cWPA: 19.55%

#1. October 12, 1980 (NLCS Gm 5)
- Score: tied 5-5 (8th inning, 2 outs)
- Opponent: HOU
- Event: 3B
- Play Description: Triple to LF; R. Avilés Scores; D. Unser Scores
- cWPA: 19.79%