Johnson mentioned first baseman Chris Marrero, outfielder Corey Brown and infielder Stephen Lombardozzi as players who have never played in the majors who could make their debuts. He also mentioned Craig Stammen, Yunesky Maya, Atahualpa Severino and Roger Bernadina as possible roster additions. Among all those names, only Lombardozzi is not on the 40-man roster.

“As far as I’m concerned, the last six weeks of this season, really, are very important to the growth of this organization,” Johnson said. “I’m a firm believer that if you develop properly, that leads to winning.”

Johnson mentioned Marrero first, perhaps a telling sign. Marrero at one point was considered the Nationals’ top prospect, but in his sixth year in the organization he has been overshadowed by newer prospects. But Marrero is still just 23, and this year he has hit .309 with an .853 OPS at Class AAA Syracuse, making only three errors on defense, an area in which he has greatly improved.