Johnson has completed the sixth inning in three straight starts, posting a 1.96 ERA with 13 strikeouts and four walks in 18.1 innings for Triple-A Pawtucket.
Johnson, who took some time off earlier this year to treat anxiety issues, looks like the strike-thrower he was before the 2016 season. He's not overpowering, but when he's on the left-hander has impeccable command and changes his speeds to keep hitters off balance.