Sixto Sánchez (3-1) retired Bryce Harper on a grounder with a man for the final out of the sixth and Kyle Garlick on a grounder with two on that ended the game.

“I went after him and was able to locate the pitches correctly and get him,” Sanchez said of Harper.

Rookie Ramón Rosso (0-1) made his first big league start after five relief appearances and allowed two runs, two hits and three walks in 2 1/3 innings. Rosso was added to the Phillies’ active roster as the 29th man.

Andrew Knapp hit a sacrifice fly in the second, but the Marlins went ahead on RBI singles by Corey Dickerson and Starling Marte. Connor Brogdon relieved Rosso with the bases loaded and struck out Garrett Cooper and Isan Díaz. Brogdon recalled from the alternate training site Sunday, retired all seven batters he faced, striking out four.

Despite 29-9 and 11-0 losses during a three-day span, the Marlins strengthened their postseason positioning.

“It’s the personality of this group,” Miami manager Don Mattingly said. “They just show character, through COVID, having to sit out all those days, missed all those games. The group has been very steady as far as get ready to play.”

Marlins: INF Eddy Alvarez, a 2014 Olympic silver medalist in speed skating who earned a promotion to the major league roster in the wake of the club’s coronavirus outbreak the first week of the season, was designated for assignment …. LHP Dan Castano was optioned to the alternate training site, and Miami selected the contract of Garrett.