Cubs manager Joe Maddon protested Chicago's 5-2 loss to the Nationals on Saturday night after twice coming out to complain about Washington closer Sean Doolittle's delivery.

After eight solid innings by Stephen Strasburg, Doolittle pitched the ninth for his eighth save in nine chances, but Maddon thought he was using an illegal delivery. Maddon believed the left-handed Doolittle was tapping his right toe on the ground before coming to the plate.

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Washington Nationals starting pitcher Stephen Strasburg throws during the first inning of the team's baseball game against the Chicago Cubs, Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Cubs manager Joe Maddon protested Chicago's 5-2 loss to the Nationals on Saturday night after twice coming out to complain about Washington closer Sean Doolittle's delivery.

Chicago Cubs starting pitcher Jon Lester throws during the first inning of the team's baseball game against the Washington Nationals, Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

A day after the Cubs scored 11 runs against five Washington relievers in the final three innings of a 14-6 win, Strasburg gave most of the bullpen a needed night off. He allowed two runs — one earned — and struck out seven without a walk while throwing 93 pitches.

Washington Nationals' Brian Dozier gestures after hitting a solo home run during the second inning of the team's baseball game against the Chicago Cubs, Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Chicago's Jon Lester, who hadn't given up an earned run in his last three outings, a span totaling 19 2/3 innings, allowed five runs and 10 hits in 4 1/3 innings.

Washington Nationals' Brian Dozier (9) high-fives teammates after hitting a solo home run during the second inning of the team's baseball game against the Chicago Cubs, Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Brian Dozier's homer gave the Nationals a 1-0 lead. Soto's two-run double capped a three-run third inning and he added an RBI-single in the fifth.

Chicago Cubs starting pitcher Jon Lester wipes his face as he walks off the field at the end of the second inning of the team's baseball game against the Washington Nationals, Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Nationals: Placed RHP Justin Miller (right rotator cuff strain) on the 10-day injured list and recalled RHP Tanner Rainey from Triple-A Fresno. ... OF Victor Robles is day-to-day after being hit on the left wrist with a pitch on Friday night. ... RHP Erick Fedde will start Tuesday against the Mets in place of RHP Anibal Sanchez (left hamstring strain.)

Washington Nationals' Adam Eaton (2) is tagged out by Chicago Cubs shortstop Javier Baez after trying to steal second during the third inning of a baseball game Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Nationals: RHP Jeremy Hellickson (2-2, 6.00) is 1-1 with a 6.06 ERA in three career starts against the Cubs.

Washington Nationals starting pitcher Stephen Strasburg (37) watches as catcher Yan Gomes (10) tags out Chicago Cubs' Addison Russell (27) who tried to score on a passed ball during the fifth inning of a baseball game Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Washington Nationals starting pitcher Stephen Strasburg (37) watches as catcher Yan Gomes (10) tags out Chicago Cubs' Addison Russell (27) who tried to score on a passed ball during the fifth inning of a baseball game Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Umpire Sam Holbrook calls out Chicago Cubs' Addison Russell (27) after Washington Nationals catcher Yan Gomes (10) tagged him out after a passed ball to end the top of the fifth inning of a baseball game Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Umpire Sam Holbrook calls out Chicago Cubs' Addison Russell (27) after Washington Nationals catcher Yan Gomes (10) tagged him out after a passed ball to end the top of the fifth inning of a baseball game Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Cubs reliever Carl Edward Jr. was informed at the end of spring training that his delivery, which featured a similar toe-tap, was illegal — a ruling that miffed Maddon and the Cubs. Mariners reliever Cory Gearrin was warned by umpires during a game Monday night regarding the same violation, even though he said he has used the same delivery for years.

Washington Nationals starting pitcher Stephen Strasburg throws during the first inning of the team's baseball game against the Chicago Cubs, Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Washington Nationals starting pitcher Stephen Strasburg throws during the first inning of the team's baseball game against the Chicago Cubs, Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

A day after the Cubs scored 11 runs against five Washington relievers in the final three innings of a 14-6 win, Strasburg gave most of the bullpen a needed night off. He allowed two runs — one earned — and struck out seven without a walk while throwing 93 pitches.

Juan Soto had two hits and drove in three for Washington.

David Bote homered in the sixth to pull the Cubs, who have lost three of four, within 5-2.

Chicago Cubs starting pitcher Jon Lester throws during the first inning of the team's baseball game against the Washington Nationals, Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Chicago Cubs starting pitcher Jon Lester throws during the first inning of the team's baseball game against the Washington Nationals, Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Chicago's Jon Lester, who hadn't given up an earned run in his last three outings, a span totaling 19 2/3 innings, allowed five runs and 10 hits in 4 1/3 innings.

He had only allowed a total of five earned runs over his first seven starts of the season.

Chicago's Kris Bryant was 0 for 4 and reached on a fielder's choice, ending his streak of reaching base safely at 26 games, and Javier Baez ended his hitting streak at 15 games.

Washington Nationals' Brian Dozier gestures after hitting a solo home run during the second inning of the team's baseball game against the Chicago Cubs, Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Washington Nationals' Brian Dozier gestures after hitting a solo home run during the second inning of the team's baseball game against the Chicago Cubs, Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Brian Dozier's homer gave the Nationals a 1-0 lead. Soto's two-run double capped a three-run third inning and he added an RBI-single in the fifth.

Strasburg didn't allow a hit until Kyle Schwarber's single to start the fourth. The Cubs' first run came with two outs in the fifth on consecutive passed balls by Kurt Suzuki.

TRAINER'S ROOM

Washington Nationals' Brian Dozier (9) high-fives teammates after hitting a solo home run during the second inning of the team's baseball game against the Chicago Cubs, Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Washington Nationals' Brian Dozier (9) high-fives teammates after hitting a solo home run during the second inning of the team's baseball game against the Chicago Cubs, Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Nationals: Placed RHP Justin Miller (right rotator cuff strain) on the 10-day injured list and recalled RHP Tanner Rainey from Triple-A Fresno. ... OF Victor Robles is day-to-day after being hit on the left wrist with a pitch on Friday night. ... RHP Erick Fedde will start Tuesday against the Mets in place of RHP Anibal Sanchez (left hamstring strain.)

UP NEXT

Cubs: RHP Kyle Hendricks (3-4, 2.86) is 2-0 with a 0.36 ERA in his past three starts, going at least eight innings each time. He's 2-2 with 2.61 ERA in seven career starts against the Nationals.

Chicago Cubs starting pitcher Jon Lester wipes his face as he walks off the field at the end of the second inning of the team's baseball game against the Washington Nationals, Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Chicago Cubs starting pitcher Jon Lester wipes his face as he walks off the field at the end of the second inning of the team's baseball game against the Washington Nationals, Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Nationals: RHP Jeremy Hellickson (2-2, 6.00) is 1-1 with a 6.06 ERA in three career starts against the Cubs.

More AP MLB: https://apnews.com/MLB and https://twitter.com/AP_Sports

Washington Nationals' Adam Eaton (2) is tagged out by Chicago Cubs shortstop Javier Baez after trying to steal second during the third inning of a baseball game Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Washington Nationals' Adam Eaton (2) is tagged out by Chicago Cubs shortstop Javier Baez after trying to steal second during the third inning of a baseball game Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Washington Nationals starting pitcher Stephen Strasburg (37) watches as catcher Yan Gomes (10) tags out Chicago Cubs' Addison Russell (27) who tried to score on a passed ball during the fifth inning of a baseball game Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Washington Nationals starting pitcher Stephen Strasburg (37) watches as catcher Yan Gomes (10) tags out Chicago Cubs' Addison Russell (27) who tried to score on a passed ball during the fifth inning of a baseball game Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Umpire Sam Holbrook calls out Chicago Cubs' Addison Russell (27) after Washington Nationals catcher Yan Gomes (10) tagged him out after a passed ball to end the top of the fifth inning of a baseball game Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)

Umpire Sam Holbrook calls out Chicago Cubs' Addison Russell (27) after Washington Nationals catcher Yan Gomes (10) tagged him out after a passed ball to end the top of the fifth inning of a baseball game Saturday, May 18, 2019, in Washington. (AP PhotoAndrew Harnik)