Herrera left Tuesday's game against the Braves with right shoulder tightness, Dan Kolko of MASN Sports reports.

EDGE Analysis

Herrera threw only six pitches to four batters, giving up two earned runs and three hits to take the loss. The severity of the injury is currently unknown, but the 28-year-old will undergo an MRI on Wednesday to provide further clarity.

Herrerra exited Tuesday's game against the Braves with an apparent injury, Chelsea Janes of The Washington Post reports.

EDGE Analysis

Herrera entered to a 1-1 tie and allowed three hits and a line-drive out to four batters before exiting the game, and certainly didn't look himself as he was charged with two earned runs. The specifics and severity of the injury are currently unclear.

Herrera tossed a perfect ninth inning and struck out one Sunday against the Reds as he notched the save.

EDGE Analysis

Herrera continues to serve as a dependable reliever, as he slammed the door in a one-run game without issue. He owns a 2.13 ERA and 1.16 WHIP with 37 strikeouts through 42.1 innings, and with Sean Doolittle (toe) on the disabled list, he figures to continue to see more save opportunities moving forward.

Herrera allowed one run on two hits and one walk while striking out one in the ninth inning as he secured the save Wednesday against the Mets.

EDGE Analysis

Herrera entered the ballgame with a three-run cushion, and after surrendering a solo home run to Wilmer Flores, he managed to induce a double play that ended the contest. Since being dealt to the Nationals, he's collected two saves and allowed seven runs over 13.2 innings while recording 13 punchouts.

Herrera allowed two hits and struck out one over 1.2 scoreless innings Sunday to record his 15th save of the season in a 6-2 win over the Braves.

EDGE Analysis

The Nats tacked on an insurance run in the bottom of the eighth inning, but with Ryan Madson having pitched in the seventh, Herrera remained in the game and picked up his first save with his new team. The 28-year-old hasn't been as sharp in DC as he was in KC, posting a 3.65 ERA and 1.62 WHIP over 12.1 innings so far, but Herrera still appears to be manager Dave Martinez's first choice to replace Sean Doolittle (toe) as closer.

Herrera allowed one earned run and struck out one to earn the hold Thursday against the Mets.

EDGE Analysis

Herrera was called on in the eighth inning with the Nationals up 5-3, bypassed for the save opportunity in favor of Ryan Madson in a surprising move. Herrera was the presumed closer with Sean Doolittle (toe) on the disabled list, but the situation is now worth monitoring if Doolittle's absence extends beyond his expected minimum 10-day stay. It's worth noting that Herrera allowed a solo home run to Asdrubal Cabrera, the fifth earned run he's surrendered across his last 7.2 innings.

Herrera will be the Nationals' closer while Sean Doolittle is out with a toe injury, Jamal Collier of MLB.com reports.

EDGE Analysis

Herrera has ample experience in the role, saving 57 games in his time with the Royals. He's an excellent replacement option for the Nationals, though he may not have the job for long, as Doolittle is eligible to return immediately following the All-Star break.

Herrera (2-1) collected his first win with Washington, tossing a perfect eighth inning in Thursday 4-2 victory over Baltimore.

EDGE Analysis

In two appearances since being traded to Washington, Herrera has thrown a pair of perfect innings with a win and a hold. Sean Doolittle locked down the save in this one as well, so it appears these two are each locked in to their respective roles.

Herrera pitched a perfect eighth inning to record his first hold of the season in Tuesday's win over the Orioles.

EDGE Analysis

He needed only six pitches (five strikes) to breeze through his first appearance in a Nats uniform, and Herrera seemed right at home in the setup role he held for the Royals for many years -- he averaged over 20 holds a season from 2012-16.

Herrera will transition to a new role in the bullpen following Monday's trade, after serving as Kansas City's closer for the past few seasons, Chelsea Janes of The Washington Post reports.

EDGE Analysis

As expected, Herrera is slated to serve as a high-leverage reliever, although he'll no longer be called upon to close out games after being shipped to Washington. Manager Dave Martinez stated Sean Doolittle is his closer, and that Herrera "will be asked to do some different things" out of the bullpen, per Janes.