VIERA, Fla. -- Top Nationals prospect Bryce Harper was a last-minute scratch because of a tight left calf and Houston Astros starter Livan Hernandez left in the third inning after being hit by a line drive in a game won by Washington 8-0 Thursday.

Ryan Zimmerman, whose liner hit Hernandez, had his first home run of the spring among his two hits and two RBIs. Nationals starter Edwin Jackson struck out three and allowed two hits over four scoreless innings.

Harper, the No. 1 overall pick in the 2010 draft, is day to day. His name was on the Nationals travel list posted in the clubhouse Thursday morning for Friday s game against Miami in Jupiter.

Hernandez talked to reporters after his outing and did not think his injury was serious.

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