The son of Deputy Commander took the lead at the top of the stretch from fellow Woodford Racing color-bearer Gallant and held off a mild bid from 1-2 favorite El Brujo, who was 2 1/4 lengths in arrears in the contest for two-year-olds, foaled in Canada.
Khabibulin finished third. Active Duty traveled 1 1/8 miles in 1:52.01.
"I got the privilege to work both of these horses," said Fraser, making reference to fourth-place finisher Gallant, who set the pace under Patrick Husbands. "It set up pretty nice for me. I was actually wondering if (Gallant) was the only one I had to worry about."
The victory was the first in the Coronation Futurity for Casse, who accomplished the feat with a gelding that had never before raced on Polytrack.
"It just worked out that way. I looked at having him ready for the Cup & Saucer," said Casse, referring to the 1 1/16-mile turf event on October 26 in which Active Duty was sixth. "When I worked him on the Polytrack, he worked quite well. He's a beautiful horse."
The Ontario-bred, who sold for $80,000 last September at Keeneland, is now 1-for-5 with $178,120.
Active Duty returned $25, $7.50 and $4.10, combining with El Brujo ($2.50, $2.10) for a $64.20 exactor. Khabibulin ($3.30) rounded out a triactor worth $222.50.