The soccer world was stunned Saturday when a 25-year-old player in Italy collapsed on the field from a heart attack and was later pronounced dead at the hospital. Piermario Morosini, a Livorno midfielder, was playing a second division game at Pescara, and the Italian Football Association postponed all weekend matches after the tragedy.

Deaths during competition have occurred in the NFL, NHL and MLB, among other sports. Below are 12 of the more notable. The list does not include Reggie Lewis of the Celtics whose heart defect caused him to collapse during an off-season workout or NFL players Korey Stringer and J.V. Cain who died at training camp.

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