What MLB pitcher holds the record for most wins in a season?

Answer:
Charles "Old Hoss" Radbourn won 60 games in 1884 for the Providence Grays.

According to MLB: http://mlb.mlb.com/stats/historical/individual_stats_player.jsp?c_id=mlb&playerID=120867&HS=True

Old Hoss won 59 games in 1884.
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First answer by ID1207330184. Last edit by Nfrance. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 28 [recommend question].