Cy Young. He also holds the record for the most losses as a pitcher.
Red Ruffing. Ruffing holds the Red Sox record for most losses in a season with 25 in 1928. His record that season was 10-25.
cy young holds the record for wins and losses
Ron Guidry posted only three losses in the 1978 season. He pitched in 35 games that year.
Fewest losses ever? Or fewest losses in a season?
Pedro Martinez. Martinez holds the Red Sox single season strikeout record with 313 in 1999.
The club record is 1.69 accomplished by Nolan Ryan in the 1981 season.
The franchise record for wins in a season is 41 by Jack Chesbro in 1904.
Cy Young.511 wins 316 losses.who holds the record for most wins and most losses.