The 27-year-old receiver played in 11 games for Edmonton last season, posting 51 receptions for 875 yards and eight touchdowns.
The six-foot-two, 188-pound receiver was named CFL's most outstanding rookie and a CFL all-star in 2015 after putting up 1,110 receiving yards and six touchdowns while helping the Eskimos to a Grey Cup title.
He was named a league all-star for the second consecutive season in 2106 after posting 1,589 yards and 10 touchdowns on 109 catches (all second best in the league).
Over 49 career games with the Eskimos, Walker has 287 receptions, 4,208 yards, and 26 touchdowns.
The Argonauts re-signed offensive lineman Will Campbell and quarterback Dakota Prukop.
The 27-year-old Campbell is entering his third season with Toronto. The Detroit native started 15 games in 2018 after playing in 14 games during his rookie season.
The six-foot-five, 308-pound lineman started at left tackle in the Argos 105th Grey Cup win over Calgary two seasons ago.
Prukop, 25, signed with Toronto in May of 2017. The former Montana State pivot played in nine games as a rookie and 14 last season, recording a combined eight special teams tackles.
TIGER-CATS SIGN DB MURRAY
The Hamilton Tiger-Cats have signed American defensive back Rico Murray.
The 31-year-old started 18 games with Ottawa last season, registering 55 defensive tackles, three special teams tackles, five interceptions and a forced fumble en route to being named an East Division all-star for the third time in his career.
Murray, a five-foot-11, 203-pound native of Cincinnati, also suited up in two playoff games for the Redblacks in 2018, including the Grey Cup in Edmonton.
Murray has appeared in 86 career CFL games (84 starts) over six seasons with the Tiger-Cats (2013-16), Toronto Argonauts (2017) and Redblacks (2018), accumulating 290 defensive tackles, 15 special teams tackles, four sacks, 15 interceptions, six forced fumbles and two touchdowns.
He has also made four Grey Cup appearances (2013, 2014, 2017, 2018) _ winning one with the Argos in 2017.
Prior to joining the CFL, Murray played nine NFL games with the Cincinnati Bengals over three seasons (2009-11), posting 19 combined tackles and two passes defended.
LIONS SIGN HARRIS
The B.C. Lions have signed American linebacker Maleki Harris to a one-year deal.
Harris spent the past four seasons with the Calgary Stampeders, collecting 35 defensive tackles and another 22 on special teams. He played under new Lions head coach DeVone Claybrooks, who took the job after serving as defensive co-ordinator for the Stamps.
"Maleki is a versatile player who can play both linebacker positions at a high level,'' Claybrooks said in a statement. "Having had him in the same defensive system for the past four years, I know he has great instincts and he brings a lot of passion to special teams as well. He knows what we're trying to build here and we're excited to land a player of his calibre.''
STEPHEN JOINS STAMPEDERS
The Calgary Stampeders have signed Canadian defensive back Courtney Stephen, who spent the first six seasons of his CFL career with the Hamilton Tiger-Cats.
In 96 career regular-season games for the Ticats, the 29-year-old Brampton, Ont., native amassed 221 defensive tackles, including nine tackles for loss, 39 special-teams tackles, 12 interceptions, two sacks, six forced fumbles, two fumble recoveries and 16 knockdowns.
Stephen also played nine post-season contests for Hamilton including the 2014 Grey Cup.
"Courtney is an established CFL veteran who has experience as a starter at safety and has also excelled on special teams,'' Stampeders president and general manager John Hufnagel said in a release. "He provides depth for us in both of those areas and he'll certainly have an opportunity to earn a significant role on the team in training camp.''
ALOUETTES ADD VETERAN RB JOHNSON
The Montreal Alouettes have signed veteran international running back Jeremiah Johnson for the 2019 season.
The five-foot-nine, 209-pound rusher has played five seasons in the CFL, including the last three with the B.C. Lions.
In 13 games last season he averaged 5.3 yards per carry for 633 yards and five touchdowns. The 31-year-old also added 308 yards on 40 receptions.
In 61 career CFL games Johnson has amassed 3,151 yards and 55 TDs on 572 carries. The Los Angeles native has also caught 162 passes for 1,415 yards and five touchdowns.
"The addition of Jeremiah gives us depth at the running back position, all while giving William Stanback another great veteran to look up to as he takes on more responsibilities in our offence,'' Alouettes general manager Kavis Reed said in a release. "On top of being a great versatile running back, Jeremiah brings precious experience to our locker room and we look forward to seeing him in action in 2019.''
Montreal also gave a one-year extension to Canadian receiver Stephen Adekolu, who has mostly played special teams, and signed American receiver Chris Brown.
ESKIMOS SIGN PARKER
The Edmonton Eskimos have signed Canadian wide receiver Anthony Parker for this coming season.
Parker spent last season with the B.C. Lions, where he appeared in nine games and caught seven passes for 99 yards as well as six punt returns for 119 yards. He also appeared in the East semifinal.