Washington doesn't have a lot of options, with 11 players now on the DL, which is tied for second-most in the majors (the Dodgers have 12). Giants manager Bruce Bochy realizes the situation Stratton faced.
Manager Dusty Baker said Harper hyperextended his left knee and was scheduled to have an MRI on Sunday.
But the pitching of Jackson and hitting of Lind was overshadowed by the Harper injury.
Jackson yielded four earned runs over five innings Saturday in a loss to the Cubs.
But the game is unlikely to have an impact on the playoff race, as the Nationals lead the NL East by 14 1/2 games and the Giants are out of contention.
Virginia was in the news Saturday for the racial unrest that took place.
MRI reveals no ligament damage; hits DL
The Nationals and Giants will play at 10:05 a.m. and 4:05 p.m. Sunday, Pacific time.
Bochy was set to give catcher Buster Posey a rare day off Friday and said he would keep him out of the lineup Saturday.
The injury to Harper opens up playing time in the outfield but would present a hard challenge if he's not ready by the start of the postseason. The All-Star has been sidelined since leaving his July 23 start at Arizona after two innings. He struck out five batters, walked one and surrendered five base hits, including a solo home run by second baseman Joe Panik in the first inning. The 2015 MVP is having another spectacular season, hitting.327 with 29 home runs and 87 RBIs while playing in 105 of the Nationals' first 113 games. Harper has been relatively healthy this season and missed just three days with mild groin soreness back in May.
"You're just thinking, 'Please, Lord, don't let it be serious, '" Baker said. Washington hopes the same fate doesn't happen to Harper. It was Samardzija who was racing into a scrum earlier this season to get to Harper, but Michael Morse got in the way and saw his season end instead. The good thing is he's young and strong.More news: Guardiola says he's not moved by talk that Man City are favourites
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