"I've told him that his stuff is as good as anybody's in the rotation," Johnson told reporters after the Giants' 8-0 win against the Padres. "He needs to be consistent with it from pitch to pitch, from inning to inning, from game to game.
"Timmy, Matt and Barry, they're established," Johnson said. "I've had a lot of the same kind of problems [Sanchez] has had, as far as mechanics and stuff like that."
The 45-year-old has said he relishes the role of working with players a decade more his junior. They seem to enjoy it, too.
In June, Sanchez told MLB.com, "When I pitch, [Johnson] tells me what I do right, what I do wrong."
Sanchez left the Big Unit with little to critique following his 51st career Major League start.
"He was locked in today," Johnson said. "It was a lot of fun to watch. I feel pretty fortunate."
Andrew Pentis is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.