After a high school football career as a star quarterback, McKean received athletic scholarship offers to 35 U.S. schools. Instead, he played junior football with the NDG Maple Leafs and then professionally with the Montreal Alouettes and the Saskatchewan Roughriders of the Canadian Football League. Though McKean desired to make it as a quarterback, he was forced into the punter role when he was traded to Saskatchewan in 1967; the Roughriders were quarterbacked by CFL standout Ron Lancaster. That would be his last year in the CFL. McKean had attended NHL referee school and worked as a college hockey referee during the football offseasons. McKean attended baseball umpire school in 1970, then worked in the minor leagues before joining the American League. His minor league service included work in the Florida State League, the Florida Instructional League, the Eastern League, the Puerto Rico Winter League and the International League.
MLB umpiring career
On the field
McKean made it to the major leagues as an umpire in 1974. By 1976, AL umpire supervisor Dick Butler said, "I'll go out on a limb and say that, in my opinion, McKean is the best of our 24 umpires. He has the perfect temperament. He can listen, he can dish it out, he can be serious and he can be humorous. He's 6-foot-2, 225 pounds, no fat and he has the kind of presence that commands respect." He was the third base umpire for Len Barker's perfect game on May 15, 1981. In 1993, he umpired in his tenth no-hitter, tying a record shared by Silk O'Loughlin and Paul Pryor. Also that year, on May 22, he was involved in a rare incident where he ejected Toronto Blue Jays mascot BJ Birdy for trying to influence one of his calls. On April 7, 1997, McKean was the crew chief for a Rangers-Brewers game at Milwaukee when play was halted three times by fans who threw baseballs onto the field; McKean and Milwaukee manager Phil Garner both used microphones to admonish fans to behave. He was also the home plate umpire for the first interleague game in Major League Baseball history between the San Francisco Giants and Texas Rangers on June 12, 1997.
Later career
McKean served as an MLB umpire supervisor from 2002 until he was fired in January 2010. MLB did not cite specific reasons for the firings, but Springstead said the actions were related to a series of missed calls by the umpires who worked the 2009 baseball postseason. Rob Manfred, executive vice president for MLB, said, "The change in supervisors is part of our ongoing effort to make our organization as strong as possible." By 2011, McKean was working as an umpiring consultant to ESPN.
