Mike Proly's career in Major League Baseball spanned several seasons during the late 1970s and early 1980s. He was a right-handed pitcher known for his time with multiple teams, including the St. Louis Cardinals, Chicago White Sox, Philadelphia Phillies, and Chicago Cubs. Proly's journey in the major leagues began when he was drafted by the Cardinals in the 1972 amateur draft.

He made his MLB debut with the St. Louis Cardinals, where he played for a brief period. His time with the Cardinals was the starting point of his professional career, allowing him to showcase his skills on the mound. Proly's role often involved coming out of the bullpen, where he was tasked with providing relief in various game situations.

After his stint with the Cardinals, Proly moved on to the Chicago White Sox. It was with the White Sox that he spent a significant portion of his career. During his tenure with the team, he was utilized primarily as a relief pitcher. His ability to handle pressure situations and deliver consistent performances made him a reliable option for the White Sox's bullpen.

Proly's career also included time with the Philadelphia Phillies. Although his period with the Phillies was not as long as with some of his other teams, he continued to contribute as a relief pitcher. His experience and skills were valuable assets to the Phillies' pitching staff during his time there.

Later, Proly joined the Chicago Cubs, where he continued to play as a relief pitcher. His role with the Cubs was similar to his previous teams, focusing on providing support from the bullpen. Throughout his career, Proly was known for his steady presence on the mound and his ability to adapt to different teams and situations.

Throughout his years in Major League Baseball, Mike Proly accumulated a record that reflected his role as a dependable relief pitcher. His career statistics include a win-loss record, earned run average, and strikeouts, which provide a quantitative measure of his performance during his time in the league.

Proly's career in baseball concluded in the early 1980s, marking the end of his time as a professional player. His years in the major leagues were characterized by his consistent role as a relief pitcher, contributing to the teams he played for in various capacities. While he may not have been a headline-grabbing star, his steady presence and reliability were valued by the teams he served.

In summary, Mike Proly's career in Major League Baseball was defined by his role as a right-handed relief pitcher for several teams.