The idea for this article came from vivaelbirdos.com, and I have used a similar approach to identify the top-five, one-season Blue Jay careers. I used FanGraphs as the source to find all players who played for the Blue Jays between 1977 and 2019. The metric employed to rank the best one-and-done seasons was fWAR.
Ron Fairly (1977 – 2.0 fWAR)
Ron Fairly’s one-season with the Toronto Blue Jays occurred in 1977, the inaugural campaign. He was a 38-year old first baseman/designated hitter who was playing in the second-last season of a 21-year career.