Michael A. Taylor scratched tonight, Danny Espinosa now starts in left

ST. LOUIS - Max Scherzer returns home to pitch at Busch Stadium for only the second time in his career. The St. Louis native looks to rebound from a brutal August, where the right-hander went 0-3 with a 6.43 ERA in five starts after dominating for most of the season's first four months.

Scherzer allowed two runs on six hits with four strikeouts over seven innings in a 4-1 loss to the Cardinals at Nationals Park on April 23. He is 0-2 with a 3.71 ERA in three career starts against St. Louis.

Right-hander Michael Wacha was scheduled to start for the Cardinals, but left-hander Tyler Lyons will take the mound instead. The Nats get a significant break as Lyons is just 2-1 with a 5.02 ERA in six starts.

The Nationals recalled rookie relievers Matt Grace and Rafael Martin from Triple-A Syracuse. The left-hander Grace appeared in 17 games for Washington in April and May, working to a 2-1 record with a 5.25 ERA. Fourteen of Grace's 17 appearances were scoreless outings.

The right-hander Martin allowed five runs over five innings with 11 strikeouts and two walks in four games after making his major league debut on April 15.

Update: Michael A. Taylor was scratched from tonight's game with right knee soreness. Bryce Harper moves to center while Jayson Werth shifts to right. Danny Espinosa will make his second start of the season in left field.

Here is the revised Nationals lineup:

RF Jayson Werth
2B Anthony Rendon
CF Bryce Harper
1B Ryan Zimmerman
3B Yunel Escobar
SS Ian Desmond
C Wilson Ramos
RF Danny Espinosa
RHP Max Scherzer

For the Cardinals:

3B Matt Carpenter
LF Stephen Piscotty
RF Jason Heyward
SS Jhonny Peralta
1B Brandon Moss
CF Tommy Pham
2B Kolten Wong
C Tony Cruz
LHP Tyler Lyons