Morrow, who has been sidelined since May 5 with right shoulder inflammation, played catch in the outfield prior to Friday night's game against Washington. It's the first time Morrow has thrown since going on the disabled list and receiving a cortisone shot in the shoulder on May 5.
One of San Diego's most effective starters before getting hurt, Morrow was 2-0 with a 2.73 ERA in five starts, and was replaced in the rotation by Friday's starter, Odrisamer Despaigne.
Morrow's return date remains uncertain, but he'll be eligible to come off the disabled list next Friday.
As for Johnson, Padres manager Bud Black was eager to watch him throw again, but was uncertain what to expect.
"He's going to throw off of the mound," Black said. "We'll see. I don't know how many pitches."
Tim Powers is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.