 In the individual 100-meter backstroke, Plummer finished second in the event, finishing behind teammate Matt Grevers with a time of 53.12 and improving upon his 5th-place finish from 2011.In the 50-meter backstroke, Plummer slipped on the start in the semifinals, causing him to finish 16th overall, unable to qualify for the finals.Plummer lost out his last chance of a gold medal in the 4x100-meter medley relay, when the team was disqualified for a false start in the final.