PHILADELPHIA -- Juan Soto took a mighty swing and the ball soared over nearly everything.
Brian Dozier and Anthony Rendon hit consecutive singles off Jose Alvarez (0-1) to start the 10th and Soto followed with a towering shot over the right field foul pole. A video review upheld the fair call.
"When I hit it, just see it fly," Soto said. "They pitched me away, away. I had to be patient, wait for the miss."
"Would we have liked a full bullpen? Absolutely," Kapler said. "But we had a few guys down who we had used regularly."
Nola, who finished third in NL Cy Young Award voting last year, gave up five runs -- four earned -- and seven hits in 6 1/3 innings. He has a 6.46 ERA after three starts.
Sean Doolittle (3-0) got five outs for the win, and Washington's struggling bullpen came through with six scoreless innings from four relievers.
"I'm proud of them," manager Dave Martinez said.
Strasburg allowed six runs and six hits in four innings. He was 5-0 with a 1.58 ERA over 10 career starts in Philadelphia before getting roughed up.
Maikel Franco tied it at 1 in the third with his fourth homer, all batting out of the eighth spot in the lineup. He hit in the middle of the order most of his career until this season. Strasburg then lost control of the strike zone. He walked Nola and Jean Segura before throwing three straight changeups in the same spot to Harper. The slugger missed one, fouled one and then blasted his fourth homer to left-center.
Segura lined a two-run triple to right to extend the lead to 6-1 in the fourth.
Harper, who spent his first seven seasons in Washington before signing a $330 million, 13-year contract with the Phillies, also homered in his first game against his old team last week.
Doolittle struck out Harper in the ninth to preserve the tie with a runner on first.
"That was fun," Doolittle said. "The energy in the stadium was electric."
Strasburg allowed more than three runs in a start in Philly for the first time. ... Kendrick had his first career pinch-hit homer.
Rendon has a nine-game hitting streak, batting .471 (16 for 34) with 10 extra-base hits and 11 RBI.
HELP ON THE WAY?
Nationals general manager Mike Rizzo said the team is considering signing veteran reliever Bud Norris. The righty was released by Toronto in spring training. He had 28 saves for the Cardinals last season.
Nationals: SS Trea Turner (broken right index finger) missed his sixth game. He's on the 10-day injured list and it's uncertain when he'll return.
Phillies: OF Roman Quinn (right oblique strain) will continue his rehab work in the minors.
RHP Jeremy Hellickson (0-0, 9.00 ERA) starts for the Nationals against his former team Wednesday night. RHP Nick Pivetta (1-0, 6.52) goes for the Phillies. Hellickson was Philadelphia's opening day starter in 2016 and 2017 and was 18-15 in 52 starts with Philadelphia. Pivetta is 1-4 with a 9.93 ERA in seven appearances against Washington.
More AP MLB: https://apnews.com/MLB and https://twitter.com/AP-Sports
Giancarlo Stanton remains out of Yankees' lineup with quad injury
Yankees outfielder Giancarlo Stanton, who is dealing with a quad injury, is not in the starting lineup for Game 4 of the ALCS.
Roberto Perez expected ready for camp after surgery
Indians catcher Roberto Perez had surgery to remove bone spurs in his right ankle.
What we've learned so far during the MLB playoffs -- and what might come next
From who will win it all to what's up with the baseball, Jeff Passan answers this October's 20 biggest questions.
Down 2-1 in ALCS, Yankees leaning on Masahiro Tanaka's big-game experience
Relying on lessons learned in Japan and from countryman Yu Darvish, Masahiro Tanaka has excelled under the brightest lights. New York needs more of the same in Game 4.
The Undefeated Roundtable: Lonnae O'Neal, Martenzie Johnson and Jerry Bembry discuss Ice Cube's comment on diversity in baseball
Does the rapper, actor and BIG3 founder have a point?
'The sound of fear': Thirty years ago, the Loma Prieta earthquake shook the World Series -- and the world
Game 3 of the 1989 World Series was minutes away when tragedy struck the Bay Area. For the players, writers and fans at Candlestick Park that day -- particularly A's ace Dave Stewart -- it was a life-altering event.