Glenn Davis, a right-handed first baseman, began his Major League Baseball career with the Houston Astros. Drafted by the team in the first round of the 1981 MLB Draft, Davis quickly rose through the minor league ranks, making his major league debut in September 1984. His early years with the Astros were marked by his powerful hitting and solid defensive skills.

In 1986, Davis had a breakout season, hitting 31 home runs and driving in 101 runs. His performance earned him a spot on the National League All-Star team and he finished second in the National League MVP voting, just behind Mike Schmidt of the Philadelphia Phillies. That year, the Astros won the National League West division, and Davis played a crucial role in their success. Although the team fell to the New York Mets in the National League Championship Series, Davis's performance solidified his reputation as a power hitter.

Davis continued to be a key player for the Astros over the next few seasons. In 1988, he hit 30 home runs and had 99 RBIs, earning another All-Star selection. His ability to consistently hit for power made him a central figure in the Astros' lineup. Despite his individual success, the team struggled to make a significant postseason impact during his tenure.

In 1990, Davis was traded to the Baltimore Orioles in exchange for three players, including future All-Star Steve Finley. His time with the Orioles, however, was marred by injuries. Davis struggled to maintain the same level of performance he had achieved with the Astros, and his playing time was significantly reduced. Over the course of his three seasons in Baltimore, he battled various injuries that limited his effectiveness on the field.

After his stint with the Orioles, Davis attempted a comeback with the Kansas City Royals in 1993, but he was unable to recapture his earlier form. He retired from professional baseball shortly thereafter. Despite the challenges he faced later in his career, Davis's early years with the Astros remain a highlight, particularly his standout 1986 season.

Throughout his career, Davis was known for his power at the plate and his ability to drive in runs.