He was a left-handed pitcher who worked in 175 Major League games, all but eight in relief, over ten seasons (1975–1983; 1985) for the Detroit Tigers, New York Mets, Cleveland Indians and Montreal Expos.

[1] When Glynn was a student at Francis Lewis High School, he sold hot dogs at Shea Stadium during Mets' games in the late 1960s and early 1970s.

[2] Glynn, however, was bypassed by his hometown team when he graduated from high school in 1971, signing as an undrafted free agent with the Detroit Tigers on September 25, 1971.

Starting the year with the Triple-A Tidewater Tides, Glynn was effective in 17 relief appearances and was recalled by the Mets to make his National League debut on June 1, 1979.

Traded to the Indians just prior to the opening of the 1981 season, he spent much of that year in Triple-A but returned to Cleveland in May 1982 to work in a career-high 47 games and earn five victories in seven decisions.