Walker was one of several Mariners present at the team's spring complex in Peoria, Arizona on Tuesday for informal workouts, Greg Johns of MLB.com reports.
The Mariners became the latest team to start welcoming players back into either their home or spring facilities Tuesday, allowing them to work out in groups of three for two-hour windows. Walker was able to play catch and run under staff supervision, and johns notes the team has instructed to players to keep their volume and intensity at a "winter workout level" for the time being until there is more clarity on a possible 2020 season. Before spring training was suspended, the veteran right-hander had built up some momentum for what was to be a comeback season of sorts, displaying good velocity and also flashing a new spiked curve that was good enough to strike out the Brewers' Christian Yelich in Walker's one spring start.