It was less than two weeks ago that Scott and his father Glenn Howard were celebrating after their victory at the world men's curling championship in Switzerland.
On Thursday, they were opponents at the Players' Championship and the youngster came through with an upset victory.
Scott, who plays second for John Epping's Toronto rink, helped his team to a 6-3 win at Credit Union Place in Summerside, P.E.I.
"Good win over pops. Move to 2-1!! Koe tonight," Scott tweeted after the win, which left both rinks with 2-1 records.
Epping, who is seeded eighth in the eight-team field, and Glenn Howard are tied for second at 3-1. Epping defeated Howard 6-3, and then drew to the four-foot to get by Koe of Edmonton 7-6 in an extra end.
Howard rebounded from the early-afternoon loss to beat Stoughton 6-4 in the evening.
Earlier in the day, the elder Howard struggled early against his son, coming up short on a draw in the first end.
Epping stole two more points in the third end when Howard third Wayne Middaugh missed a takeout after falling in his delivery. Glenn, who skips the Coldwater, Ont., rink, then followed with a rare miss.
The elder Howard teamed with Middaugh, Brent Laing and Craig Savill to win world gold at St. Jakobshalle earlier this month. Scott was an alternate on the team.
This week's tournament is the final event of the 2011-12 Capital One Grand Slam of Curling season.
Meanwhile, it was a day of redemption for Mike McEwen and his Winnipeg rink.
After going 0-2 on Wednesday, McEwen rebounded with wins of 4-3 over Winnipeg's Jeff Stoughton, and a 7-6 extra-end win over Brad Gushue of St. John's, N.L.
"We had to dig deep today," said McEwen. "The curling gods were not shining on us yesterday, and we probably deserved a better fate than 0-2."
McEwen credited lead Denni Neufeld with setting the stage for the game-winning point.
"Our lead almost won the game for us on his first two shots [of the extra end]," said McEwen. "Brad's last shot may have picked a bit because it had perfect weight and perfect line, or I would have had to draw to a decent piece of the button."
McEwen did not have to throw his final rock.
Martin improves to 4-0
Edmonton's Kevin Martin defeated Gushue 4-2 and the Niklas Edin rink of Sweden 6-4 to remain the only undefeated men's team at 4-0.
Martin opened the scoring with three points in the fourth end. Gushue missed his last shot of the end by over-curling on a tap attempt and crashing on a guard.
Gushue got two points back in the sixth end with a draw of his own, but couldn't get any closer in the battle of former Olympic champions.
In women's play, Winnipeg's Cathy Overton-Clapham clinched first place in the round robin, and a semifinal berth.
Overton-Clapham, third stone Jenna Loder, second stone Ashley Howard and lead Breanne Meakin won twice on Thursday to remain undefeated.
"Being 6-0 in this competition is something we couldn't have asked for," said Overton-Clapham, who is a fan favourite at EastLink Arena.
Five other teams ¡ Jennifer Jones (4-2), Stefanie Lawton (4-2), Sherry Middaugh (3-3), Silvana Tirinzoni (3-3) and Heather Nedohin (3-3) ¡ are in the hunt for the final three semifinal berths.
Overton-Clapham edged Winnipeg's Chelsea Carey 4-3 in the morning draw, and then outlasted Switzerland's Tirinzoni 6-4 in a late-afternoon game.
Overton-Clapham took a 5-4 lead into the final eighth end, and made a tap against two to sit for shot rock. Tirinzoni's hammer shot for a deuce did not curl enough, allowing Overton-Clapham to steal a single point.
In addition to $370,000 in prize money, two spots in the 2013 Olympic Trials — one for the women and one for the men — are up for grabs this week.