Grand Rapids Baldwin began his professional baseball career in 1883 playing for the
Grand Rapids, Michigan, team in the
Northwestern League.
Milwaukee Brewers In 1884, at age 25, Baldwin played for the
Milwaukee Brewers of the Northwestern League. He compiled a 9–10 record in 22 games in the Northwestern League despite having an impressive 1.17
earned run average (ERA). The Northwestern League disbanded during the 1884 season, and the Brewers became part of the
Union Association, considered a major league, toward the end of the season. Baldwin made his major league debut with the Brewers on September 30, 1884. He compiled a 1–1 record and 2.65 ERA in two games in the Union Association.
Nickname Baldwin was given the nickname "Lady" because of his "quiet ways" and his refusal to swear or to come into contact with either tobacco or liquor.
Detroit Wolverines During the 1885 season, Baldwin was acquired by the
Detroit Wolverines of the
National League. He appeared in 21 games for Detroit in 1885 and, despite an impressive 1.86 ERA, managed only an 11–9 record for a team that finished in sixth place with a 41–67 record. In 1886, the Wolverines acquired "The Big Four" (
Dan Brouthers,
Deacon White,
Hardy Richardson, and
Jack Rowe) from Buffalo and improved to second place and an 87–36 record. Baldwin accounted for nearly half of Detroit's victories in 1886. He compiled a record of 42–13 with a 2.24 ERA in 487
innings pitched,
striking out 323 of 1,936
batters faced. Baldwin also
completed 55 of 56 games, seven of which were via
shutout. Another was a one-hitter against Washington in June 1886 in which he struck out 13 batters. Baldwin's 42 wins in 1886 set a major league record for a left-handed pitcher and remains the second highest single season total by a southpaw. Baldwin was also "reputed to be the first southpaw hurler to master the curve." In 1887, the Wolverines won the
National League pennant and the
1887 World Series. However, a shoulder injury sidelined Baldwin during the season, and he was "sent home without pay" in late July. Baldwin was also a strong hitting pitcher. During Detroit's 1887 championship year, Baldwin compiled a respectable .271
batting average and a .354
on-base percentage.
Brooklyn and Buffalo Baldwin attempted a comeback in 1890. He split the 1890 season between the
Brooklyn Bridegrooms of the National League and the
Buffalo Bisons of the
Players' League. He compiled a 3–5 record and 4.78 ERA in nine games for the two teams. ==Family and later years==