Steve Luebber's journey in professional baseball began when he was drafted by the Minnesota Twins in the 13th round of the 1967 Major League Baseball Draft. A left-handed pitcher, Luebber made his MLB debut with the Twins on September 2, 1971. His early years in the majors were marked by the typical challenges faced by young pitchers, as he worked to establish himself in a competitive environment.

Luebber's time with the Twins saw him primarily in a starting role, although he also made appearances as a reliever. His rookie season in 1971 was brief, with only a couple of games, but he returned to the majors in 1972, appearing in 15 games and starting 10 of them. During this period, Luebber demonstrated his potential, though consistency was sometimes elusive.

The 1973 season was a turning point for Luebber, as he spent the entire year in the minor leagues, honing his skills and refining his pitching technique. He returned to the Twins in 1974, where he had his most active season, appearing in 24 games and starting 17. That year, he recorded a 6-8 win-loss record with a 4.00 ERA, showcasing his ability to compete at the major league level.

Luebber's tenure with the Twins continued until 1977, though he spent significant time in the minors during these years. In 1976, he had a brief stint with the Toronto Blue Jays, but he did not appear in any major league games for them. Instead, he continued to develop his craft in the minor leagues, where he remained a reliable pitcher.

In 1979, Luebber found an opportunity with the Baltimore Orioles, making a single appearance for the team. His time in the majors was limited, but he continued to play professionally in the minor leagues, where he was valued for his experience and leadership.

Throughout his career, Luebber's statistics reflect the journey of a player who experienced both the highs and lows of professional baseball. His major league career concluded with a win-loss record of 6-10 and an ERA of 4.62 over 66 games. While his time in the majors was intermittent, Luebber's dedication to the sport was evident in his continued presence in the minor leagues, where he played until 1981.

After retiring as a player, Luebber transitioned into coaching, sharing his knowledge and experience with younger players. His post-playing career included various coaching roles in the minor leagues, where he contributed to the development of future major league talent.