Rapid Redux, a 5-year-old gelding, earned his fifth victory of the year, the most for any runner in North America, by taking the eighth race at Laurel Park.
The chestnut, ridden by Sheldon Russell and trained by David Wells, won the starter allowance test over three other entrants.
The horse is 5-for-5 this year, having won three times at Laurel, once at Charles Town and once at Parx Racing.
Since being claimed for $6,500 at Penn National in October by owner Robert Cole, the son of Pleasantly Perfect is 8-for-9 with seven straight victories.
Rapid Redux, who paid $2.80, has 13 victories in 27 career starts for $202,625.
Trainer: New York racing authorities have ordered 2008 Preakness-winning trainer Rick Dutrow Jr., who won the 2008 Derby and Preakness with Big Brown, to show why he should not be suspended, lose his license and be kicked off state tracks for various infractions.
The New York State Racing and Wagering Board suspended Dutrow, who was raised in Maryland, twice last month.
The suspensions totaled 90 days for hypodermic needles in his barn and for a winning horse's positive test for a banned painkiller at Aqueduct last year.
Dutrow has appealed and the New York board has scheduled hearings for March 30-31.