Rendon, the No. 6 overall pick in 2011 out of Rice University, was promoted to Harrisburg from Class A Potomac. The 22-year-old got a late start to the season due to a badly sprained left ankle but posted a .333/.438/.630 batting line in nine games with Potomac.
"I think it's great," Johnson said of Rendon's promotion. "As long as he's healthy, that stroke of his will hunt at most levels. That's good."
Could Rendon climb all the way to the Major League roster by September? It would appear unlikely, given his late start and his lack of experience in the Minors.
But he already has a spot on the Nationals' 40-man roster, and Johnson wouldn't eliminate the possibility that Rendon could make his way to Washington once the active rosters expand from 25 to 40 players.
"He might be. We'll see how he finishes up," Johnson said. "This is the year of the young guys all around baseball, and he's another one right in that mold. ... He might be old for the young guys."