The Regina native played two seasons in Saskatchewan after being claimed as a territorial junior in 2012. He was claimed by Ottawa in the expansion draft and is a Rider again after signing a one-year free-agent deal. The 27-year-old defensive lineman who spent four seasons with the Redblacks had five quarterback sacks and 23 defensive tackles in 2017.
In 86 career games, Evans made 87 defensive tackles, 22 sacks, one interception and one touchdown. He is a two-time Grey Cup champion - winning with the Riders in 2013 and with Ottawa in 2016.
Meanwhile, A-C Leonard has left Saskatchewan to join the Redblacks.
Leonard, 26, spent the last two seasons with the Roughriders. He registered 66 tackles, 10 sacks and a forced fumble in 33 games.
On the offensive side of the line, the Riders signed Canadian centre Dan Clark to a two-year contract extension.
The deal keeps the six-foot-two, 310-pound Clark with Saskatchewan through the 2019 season preventing him from hitting the free agent market.
Clark, 29, of Regina has spent the past five seasons with the Riders. He has appeared in 29 career regular-season games, four playoff contests and the `13 Grey Cup since joining the club in 2009 as a territorial junior.
The Riders released three players including Derek Dennis. The 2016 CFL offensive lineman of the year with Calgary signed a year ago as a free agent but struggled to prompt a move of the Import from tackle to guard.
Import defensive lineman Antonio Longino and Import linebacker Glenn Love were also released.
The Riders have lost Canadian receiver Nic Demski. The former first-round draft choice has signed with his hometown Winnipeg Blue Bombers joining former teammates Darian Durant and Weston Dressler.
The six-foot, 210-pound Demski spent his first three CFL seasons with the Riders. Demski appeared in 40 career regular, season games, registering 69 receptions for 725 yards and three touchdowns. He also had 84 punt returns for 729 yards and a TD.
The Riders also signed Canadian fullback and special teams player Spencer Moore to a two-year contract extension.
Tuesday marked the beginning of the free agency period in the CFL.