Rowan junior Shai Mumford, a West Deptford graduate, ran a season-best 21.40 to win the 200-meter dash Thursday at the All-Atlantic Regional Track and Field Championships at Brockport, N.Y.
Mumford ran within 8-100ths of a second of his PR of 21.32, which he ran last year at another upstate New York meet — in Oneonta, N.Y.
Mumford out-sprinted Hamilton senior Eli Saucier of Hamilton (N.Y.), who was second in 21.47, with junior Alex Kainer of Stevens Institute another step behind in 21.53.
Mumford’s best time previously this spring was a 21.53 last month in a meet in Bethlehem, Pa.
The 21.40 ranks No. 10 in NCAA Division 3 this year. The times were PRs for Saucier and Kainer.
Mumford’s high school PR was a 21.72 to win the 2014 South Jersey Group 2 sectionals at Buena.