The Washington Nationals continued to toy with various roster options Friday, as both first baseman Nick Johnson and shortstop Cristian Guzman were at Wrigley Field but unavailable for Friday's 4-3 victory over the Chicago Cubs.

Johnson had an anti-inflammatory injection in his bruised heel on Thursday before the club departed from Washington, a procedure the Nationals hoped would allow him to play over the weekend. But Manager Frank Robinson said he doesn't expect to use Johnson during the Cubs series.

Wil Cordero started in Johnson's place and went 2 for 4, scoring a run. After starting the season 1 for 32, he has three hits and two walks in his last nine plate appearances.

Guzman, who strained his left hamstring Thursday against Pittsburgh, said, "It's still tight, but it feels better."

Minor Leaguers Suspended

Two Nationals minor leaguers were suspended for violations of the drug prevention and treatment program. Ramon Castro, a shortstop hitting .285 for Class AA Harrisburg, was suspended for 105 games and fined an undisclosed amount for his second violation, according to Major League Baseball. Josh Labandeira, an infielder who split time between Harrisburg and Class AAA New Orleans, was suspended 15 games.

A club source said the violations weren't for steroids, but were for amphetamines.