The 33-year-old American-born athlete, who won gold in the 3000m at the 2018 Commonwealth Games on the Gold Coast in Australia, ran a personal best 4:31.48 to finish fourth, bettering her previous best time of 4:32.86 done in Birmingham eight years ago.
Sinclair’s previous national record of 4:32.33 was set in 2005 in Gainesville.
Saturday’s race was won by Abigail Nichols in 4:29.12 ahead of Harvard’s Maia Ramsden (4:30.19) and Alli Cash (4:31.40).
Mowatt, who will oversee the sprints and hurdles for the BU Terriers, joins the staff there after serving as the volunteer assistant track & field coach at the University of Arkansas where the women were crowned the 2024 NCAA Outdoor Track & Field champions.
Since starting in the role in 2022, Mowatt was responsible for the sprints and hurdles for the women's program and served as the recruiting coordinator.
While there, he coached four NCAA individual champions in Rachel Glenn, Nickisha Pryce, Amber Anning and Phillip Lemonious. He also helped multiple athletes become SEC champions and coached his athletes to four school record performances.
"I am very excited to welcome Kemar to our program and Boston University," Cartwright told Goterriers.com.
"We cannot wait to see the impact he will have on our student-athletes in the classroom and on the track."
Simultaneously, Mowatt was an assistant track & field coach at Hurdle Mechanic Track Club where he started in 2023.
He coached all sprints and hurdles athletes and was one of two coaches accountable for qualifying five athletes to the 2024 Paris Olympics.
Prior to coaching in Arkansas, Mowatt was the volunteer assistant coach for track & field at Clemson where he oversaw the development of both the men's and women's sprints and hurdles squads and assisted in the team's marketing efforts. His athletes achieved three school records.
"I am extremely excited and deeply honored to take on this position as men's and women's assistant sprints/hurdles coach," said Mowatt.
"I want to express my sincere thanks to director Grant Cartwright and the entire Boston University administration for their unwavering commitment to providing the best possible experience for student-athletes. I am eager to collaborate with exceptional coaches and support staff and the academic community to help develop the next generation of Terriers."
Mowatt ran professionally with Adidas Running from 2019 to 2023. He was a semi-finalist in the 400m hurdles at the 2021 Tokyo Olympic Games.
In addition to being a two-time Jamaican National Champion and 2017 World Championships finalist in the 400m hurdles, Mowatt won bronze in the event at the 2019 Pan American Games, was a semifinalist at the 2022 World Athletic Championships and was a 2022 Commonwealth Games Finalist.
As a student-athlete at Arkansas, Mowatt was a nine-time USTFCCCA All-American and a two-time SEC Outdoor Champion in the 400m hurdles. Mowatt earned All-American status throughout his tenure in the 400m hurdles, the 4x100m relay and 4x400m relay.