Dickson scored four times, including 11 seconds into overtime, as Calgary edged the Colorado Mammoth 12-11 in National Lacrosse League action.
He scored twice within a 30-second span late in the fourth quarter to give Calgary (7-5) an 11-10 lead. Sean Pollock forced overtime for Colorado when he scored with 37.9 second left in the fourth.
After taking a late penalty, Dickson came out of the box to score with 2:25 and 1:55 left in regulation to become the night's hero.
"It was nice especially after taking that stupid penalty there," said Dickson, who took a slashing minor with 4:40 remaining, the only penalty Calgary was able to kill all night. "The defence bailed me out big time. I owed it to them to put a couple in the back of the net."
Calgary is now tied with the Washington Stealth and Edmonton Rush for the lead in the NLL's West Division.
Shawn Evans had three goals and seven assists for the Roughnecks. Dane Dobbie had a pair of goals, while Geoff Snider, Scott Ranger and Jeff Shattler scored as well.
Pollock had a hat trick for Colorado (4-8), while Jordan McBride had two goals and five assists. John Grant had three goals and three assists for the Mammoth.
Grant, from Peterborough, Ont., is now three points away from passing Victoria's Gary Gait for third all-time in NLL scoring. Grant has 1,163 points to Gait's 1,165.
Adam Jones, Jamie Lincoln and Creighton Reid also scored for the Mammoth.
The Roughnecks dug a huge hole in the first half because of penalties. Colorado had four power-play goals and led 7-2 at one point in the second quarter.
Colorado was 5 for 6 on the power play for the game and Calgary 5 for 7.
"The two games we played them prior to tonight their power play percentage was in the 70s, so we knew they were good on the power play," said Roughnecks assistant coach Bruce Codd. "We tried to do some different things and it didn't work out early, but the last kill we had with four minutes to go was absolutely huge.
"We got the one kill when we really needed it."
Grant scored on three of his four shots in the first half, two of them on the power play, and Colorado exploded for a five-goal second quarter.
A five-minute roughing call on Colorado's Rory Smith late in the second quarter set the Roughnecks up for three power-play goals that got them back in the game at 8-6. Colorado led 9-6 heading to the fourth quarter.
"Those three goals were big for us; it gave us quite a boost and we got back in the game," Evans said. "(Goalie) Mike Poulin and our defence dug deep and our offence went to work."
Mammoth coach Bob Hamley agreed that Smith's penalty turned the game around.
"To me that was the difference in the game. I thought we out-played them before that," he said.
Calgary outshot Colorado 51-43.
NOTES — Attendance was 9,493. ... Smith of Mimico, Ont., has played 81 NLL contests without scoring a goal . ... Evans reached 200 goals for his career with his second goal of the night . ... The Roughnecks prepare for a key home-and-home series with the Stealth with games next Saturday and in Calgary April 6 . ... The Mammoth return home to Denver to face the Philadelphia Wings next Saturday.