[9] The second–ranked wrestler in the country, McKenna claimed the Pac-12 Conference title and placed third at the NCAAs, only losing to Bryce Meredith in the latter and bouncing back to beat Anthony Ashnault in his last match of the season.

[19] After a second–place finish at the Junior World Championships, McKenna made his senior freestyle debut in November 2014 at the age of 19, placing fourth at the Bill Farrell Memorial International.

[43] He captured the crown after tech'ing all of his four opponents, most notably four–time All–American for Rutgers and representative of Puerto Rico Sebastian Rivera, helping the USA reach all ten medals in freestyle.

[48] After a back-and-forth win over Evan Henderson to make the finals, McKenna beat rival Yianni Diakomihalis in another slugfest, before being downed twice convincingly, losing the series.

[49] To start off the year, McKenna placed fifth at the prestigious Golden Grand Prix Ivan Yarygin, notably downing two-time World medalist Akhmed Chakaev.

[50] McKenna competed at the prestigious Yasar Dogu International on February 27, claiming a bronze medal after going 4–1, only losing to World Champion Zagir Shakhiev in a close bout.

[51] On May 8, McKenna defended his Pan American championship in Acapulco, Mexico, defeating Olympian Agustín Destribats and four-time All-American Sebastian Rivera in order to do so.

[54] To start off the year, McKenna racked up silver medals at the Grand Prix Zagreb Open and the Ibrahim Moustafa Ranking Series, as well as a bronze at the Dan Kolov & Nikola Petrov Tournament.

[57] In April, McKenna placed second at the US Open, falling to two-time NCAA champion Nick Lee in the finals and failing to advance in the US World Team Trials process.

[62] In January, McKenna claimed a bronze medal from the Grand Prix Zagreb Open, soundly defeating returning World finalist Sebastian Rivera.

[63] Zagreb, Croatia Fort Worth, Texas Budapest, Hungary Newark, New Jersey Las Vegas, Nevada Sofia, Bulgaria Alexandria, Egypt Zagreb, Croatia Taraz, Kazakhstan Warsaw, Poland Istanbul, Turkey Arlington, Texas Krasnoyarsk, Russia Warsaw, Poland Guatemala City, Guatemala Rome, Italy Kyiv, Ukraine Austin, Texas Coralville, Iowa United States Krasnoyarsk, Russia Rome, Italy Fort Worth, Texas New York City, New York East Stroudsburg, Pennsylvania Las Vegas, Nevada Minsk, Belarus State College, Pennsylvania Las Vegas, Nevada Bydgoszcz, Poland Rochester, Minnesota Bucharest, Romania Spala, Poland Madison, Wisconsin Las Vegas, Nevada Minsk, Belarus Havana, Cuba Colorado Springs, Colorado Rio de Janeiro, Brazil New York City, New York