Natalliah Whyte ran a personal best 22.39 seconds (1.2m/s) in the 200m and Andrenette Knight ran a season's best 54.20 seconds in the women's 400m hurdles as both were among the winners at the Music City Track Carnival at the Vanderbilt Track Facility in Nashville, Tennessee, over the weekend.
Whyte, who was also a finalist in the 100m, made the qualifying standard for the 200m at the World Athletics Championships set to be held at the National Athletics Centre, in Budapest, Hungary, in August.
Tyrese Reid also ran a lifetime best in the men's 800m, while Jaheel Hyde and Javon Francis clocked season's best efforts.
Whyte sped to victory in the 200m, lowering her previous personal best 22.55, which was set in April 2018 in Auburn, South Carolina.
American Candace Hill was second to Whyte in a season's best 22.57 and Jessika Gbai of the Ivory Coast was third in 22.69, also her best of the season so far.
Whyte was sixth in the 100m final in a season's best 11.13 (0.9m/s) after qualifying seventh with 11.27 (-0.8m/s).
Knight won back-to-back races in lowering her season's best from 54.90 and moved up to fifth on the World Athletics rankings.
Kimisha Chambers finished sixth in 57.28.
Reid, the former Spot Valley High runner and Mississippi State senior, won the men's 800m C race in 1:46.09 minutes, more than two seconds under his previous best of 1:48.77, which was recorded in April 2022.
Reid's time would have been good enough to place him fifth in the main race.
Hyde lowered his personal best in the 400m hurdles to 48.57 as he placed second in the men's pro race, while Marvin Williams was also second in the men's B race in 50.58.
Francis also ran a season's best 45.10 for second place in the men's 400m pro, race while Jelani Walker was sixth in the men's 100m in 10.20 seconds (0.5m/s) after running 10.25 (-0.1m/s) in the first round.
Andre Edwards ran 10.35 seconds (0.4m/s) in the qualifying and did not advance.
Nayoka Clunis was third in the women's hammer throw with 68.00m, while Erica Belvit was seventh with 66.12m; Rajindra Campbell was third in the men's shot put with 20.23m; Lloyricia Cameron was also third in the women's shot put with 16.50m; and Kimberly Williamson was fourth in the women's high jump, clearing 1.80m.