Livorno players and officials rushed to hospital, where they were told their teammate had passed away.
The match was abandoned with Livorno leading 2-0, and the other players left the field in tears.
Livorno eased their fears of relegation with a hard-fought 2-1 victory over Parma at the Stadio Armando Picchi.
Undeterred, he went to Leghorn (now Livorno) and established a successful medical practice.
In other action on Sunday, Palermo stepped up their campaign for a Champions League place with a 1-0 win over Livorno.
CNN: Inter held by Genoa in San Siro but stay four points clear
Blerim Dzemaili pulled one back for Parma six minutes later but Livorno held on as Francesco Guidolin's side ran out of steam.
MILAN Livorno midfielder Piermario Morosini died Saturday after suffering cardiac arrest and collapsing on the pitch during his team's Serie B match at Pescara.
In Saturday's other game, top scorer Antonio Di Natale returned from suspension to inspire Udinese to a 2-0 win at home to struggling Livorno.
In Italy, Juventus continued their miserable run with a 1-1 draw at lowly Livorno , the second in a row for new head coach Alberto Zaccheroni.
CNN: Bayern join Leverkusen at the top; Juventus falter again
Amedeo Modigliani was born in 1884, in the Italian port city of Livorno, the last of four children of a couple whose marriage united two Sephardic Jewish clans.
In February 1785 The Times listed opium from Smyrna (now Izmir) between oil from Leghorn (Livorno) and peas from Dantzic (Gdansk) in its roundup of goods unloaded at the port of London.
Jose Mourinho's Inter travel to struggling Livorno on Sunday on the back of a pulsating 5-3 victory against Palermo on Thursday night, and will be seeking to capitalize on their rivals' latest lapse.
Speckled by ancient ruins, it even has a wine route: the Strada del Vino Costa degli Etruschi, which runs south from Livorno to Piombino and across to the island of Elba, edged by searing-blue water and with views to sigh over.
Livorno, who moved up to 15th place and also held AC Milan 1-1 last weekend, took the lead in the 26th minute with a header from diminutive striker Antonio Filippini before Juve defender Nicola Legrottaglie nodded in off the post to level four minutes before halftime.
CNN: Bayern join Leverkusen at the top; Juventus falter again
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