The team with the worst winning percentage in the history of MLB -- the 1899 Cleveland Spiders -- still managed to win 20 games out of the 154 they played that year. This dismal .130 winning percentage is so bad that it is extremely unlikely that any MLB team will do worse. The 1916 Philadelphia Athletics -- the third worst team in MLB history -- had a .235 winning percentage, 100 points better than the Spiders.
Barry Bonds who uses steroids
73 home runs. Barry Bonds hit them in 2001.
Barry Bonds set the single season home run record with 73 home runs in 2001.
If you're talking about the Modern Era (1900 to present) then it would be Roger Maris.
Lionel Messi holds the record for scoring the most goals in a single season in the Champions League.
Sergio Agero holds the record for the most Premier League hat tricks in a single season.
1998 Mark McGwire Baseball Single-season home run record1998 Sammy Sosa Baseball National League MVP
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The Premier League record points total achieved by a team in a single season is 100 points, achieved by Manchester City in the 2017-2018 season.
The record for the most points earned by a team in a single Premier League season is 100 points, achieved by Manchester City in the 2017-2018 season.
The team that holds the record for scoring the most goals in a single season in the UEFA Champions League is FC Barcelona.
Career and Single Season RBI LeadersHank Wilson of the Chicago Cubs holds the major League record for RBIs in a single season with 191 hit in 1930. New York Yankees, Lou Gehrig holds the American League record for RBIs in a single season with 184 in 1931. Hank Aaron holds the Major League record for career RBIs with 2,297 and the National League record with 2,202. Babe Ruth is second in career RBIs with 2,218, and hold the American League career RBI record with 2,201.