It's a familiar, understandable story: A team goes up 3-1 in a best-of-seven postseason series and nearly everyone declares the series over. It makes perfect sense: With only one more win between that team and a championship — and with three chances to win that one game — it definitely seems like a safe bet.

Yet, as baseball often reminds us, there really aren't any safe bets. So even though the Astros seem all-powerful right now in the ALCS and the Yankees seem feeble, nothing is guaranteed. 

Since 1979, MLB teams have overcome a 3-1 postseason deficit 10 times. One of those teams even did it twice in the same postseason. Some teams just find another gear when facing elimination, while others take advantage of mistakes, collapses or their opponents' bad luck. Sometimes it's a mix of everything.