10. Daniel Murphy

Daniel Murphy has had himself an October, setting the all-time postseason record for six consecutive games with a home run. He was named the 2015 NLCS MVP, and the toast of the town as the New York Mets were finally going back to the World Series to face the Kansas City Royals.

Then he committed an all too crucial error in Game 4 of the World Series against the Kansas City Royals, opening the KC floodgates for three unanswered runs. The Mets led the game 3-2 in the eighth inning, but Murphy’s error with one out and the chance to get at least one out, instead went no outs and a tie ballgame. And later a Royals win as they would put up three in the 8th. The Royals lead the series 3-1 instead of the Mets potentially tying the series.

You can’t ever assume an out right?