CALGARY -- The Calgary Stampeders took advantage of a trio of costly turnovers by the Ottawa Redblacks on their way to a convincing 48-3 win on Saturday night.

Ottawa's punt return team had a rough game as Brandon McDonald fumbled a pair of punts in the first half, while Jovon Johnson dropped another punt in the third quarter. Calgary's special-teams unit recovered all three fumbles and quickly turned each of the turnovers into touchdowns.

"That's something that we've been talking about since Day 1, is trying to be the spark for this team and today we really were," said Adam Berger, who recovered one of the fumbles by McDonald. "The three fumble recoveries were huge. The offence was rolling, the defence was rolling and we were just feeding off of everything too. It was a great game."

Bo Levi Mitchell threw a pair of touchdown passes and ran for two more to lead the Stampeders (5-2) to the win in front of 27,566 fans at McMahon Stadium.

Joe West and Eric Rogers caught touchdown passes in the second quarter from Mitchell, who completed 17-of-25 passes for 243 yards before giving way to backup quarterback Drew Tate in the third quarter.

"It's a credit to all the guys," Mitchell said. "The receivers got the game ball tonight on offence because that's just who they are. They just went out and won all night."

Matt Walter ran for another TD, while Rene Paredes kicked three field goals, three converts and a single for the Stampeders (5-2), who avenged a 29-26 overtime loss they suffered to the Redblacks (4-3) in Ottawa on July 24. Rob Maver added a single, while Calgary also scored on a safety.

Chris Milo accounted for all of Ottawa's points when he kicked a field goal in the first quarter. The Redblacks had won their previous two games.

"They did a good job of getting pressure on me and taking away our running game," said Ottawa quarterback Henry Burris, who completed 7-of-16 passes for 114 yards.

"We just couldn't get anything going on our side, get momentum, and turnovers definitely didn't help us. They played like Grey Cup champions tonight. We've got to learn from this."

Randy Chevrier recovered McDonald's first fumble early in the first quarter on the Ottawa 37-yard line. Two plays later, Mitchell ran the ball into the end zone from 11 yards out and then promptly threw a three-yard pass to Tory Harrison for a two-point convert to put Calgary up 8-0.

Milo kicked a 31-yard field goal for the Redblacks at 10:38 of the first quarter before Mitchell capped off a four-play, 63-yard drive by the Stampeders early in the second with a one-yard TD run.

One play after Berger recovered another fumble by McDonald deep in Ottawa territory, Mitchell tossed a 17-yard touchdown pass to West. Parades then added a 22-yard field goal with 57 seconds left in the first half.

After the Redblacks went two-and-out, Mitchell engineered a quick four-play, 65-yard drive that culminated with a 23-yard touchdown strike to Rogers on the goal line with just three seconds left on the clock.

Paredes opened the second half with a 68-yard single before Calgary extended its lead to 34-3 when backup Ottawa quarterback Thomas DeMarco conceded a safety in the end zone.

Things went from bad to worse for the Redblacks when Joe Burnett recovered a fumble by Johnson, once again deep in Ottawa territory, which led to a six-yard TD run by Walter on the next play.

Paredes then booted two more field goals from 34 and 36 yards out, before Rob Maver added a 56-yard single.

Notes: The Stamps now have a perfect 9-0 record in games following a bye week since John Hufnagel started as Calgary's coach and general manager in 2008. Tate suited up for his 100th CFL regular-season game with the Stampeders. Milo also missed a 36-yard field goal attempt late in the game when the ball bounced off the right post and back onto the field.