Manager Dave Martinez confirmed Monday that Harris (arm) will open the season on the injured list, Maria Torres of The Athletic reports.

EDGE Analysis

Harris dealt with an arm issue this month which was thought to be a blood clot, though a second opinion determined that wasn't the issue. While that's a positive, he'll still have to be cleared to resume throwing by team doctors and then will have to make up for lost buildup time. It's not clear when he's expected to be ready to pitch this season.

Harris received a second opinion on his arm Friday that determined he did not have a blood clot in his arm, nor is he suffering from thoracic outlet syndrome, Jesse Dougherty of The Washington Post reports.

EDGE Analysis

Nats manager Dave Martinez created some confusion Friday when he said the reliever had undergone a "procedure" to correct the issue, but in reality Harris had consulted with Dr. Robert Thompson at Washington University of St. Louis, and the specialist had given him a relatively clean bill of health. Harris has missed two weeks of camp and still has to clear intake testing before he can rejoin the team, so he will likely need to begin the season on the injured list and build his arm strength back up at the alternate training site before making his season debut.

Harris is recovering after undergoing a procedure to remove a blood clot from is right arm, Jessica Camerato of MLB.com reports.

EDGE Analysis

The 36-year-old was diagnosed with the blood clot last week and is now on the recovery track. Harris remains without a timeline for his return, but he's likely out for Opening Day since he hasn't played in a spring game since March 9.

Harris was diagnosed with a blood clot in his right arm after undergoing an MRI on Friday, Mark Zuckerman of MASNSports.com reports.

EDGE Analysis

The 36-year-old will visit a doctor to determine a treatment plan and should be considered out indefinitely until the team provides a recovery timeline. Harris hasn't pitched in a Grapefruit League game since March 9, so he already appears likely to be sidelined for Opening Day.

Harris hasn't allowed a run over two innings in two Grapefruit League appearances to begin the spring, giving up one hit and striking out one.

EDGE Analysis

The veteran right-hander had a bit of a rough first campaign with the Nats and saw his walk rate spike to 11.3 percent over 17.2 innings, leading to a bloated 1.70 WHIP, but unlike last year Harris is healthy this spring. He figures to join Daniel Hudson and Tanner Rainey as part of a right-handed set-up crew in front of closer Brad Hand, a role that could allow Harris to reach 20 holds in a season for the fourth time in his career.

Harris gave up a hit and struck out one in a scoreless seventh inning to record his first save of the season during the first game of Saturday's doubleheader against the Mets.

EDGE Analysis

With the score tied 3-3 in the sixth inning, Harris began warming up, but when the Nats took the lead in the bottom of the frame, manager Dave Martinez elected to let the right-hander handle the save chance. Harris had a tough start to his tenure with Washington but has now reeled off six straight scoreless appearances, giving him a 3.06 ERA, 1.70 WHIP and 21:9 K:BB through 17.2 innings.

Harris (0-1) allowed one run on three hits while striking out a batter in an inning of work as he was dealt the loss Wednesday against the Phillies.

EDGE Analysis

Harris entered the game after Patrick Corbin allowed an opening triple to begin the seventh and was unable to salvage a 2-1 lead. He allowed the runner from third to score on an RBI single before Bryce Harper drove in another with two outs. It wasn't all Harris' fault as Victor Robles and Adam Eaton had a collision out in right field on a flyball that neither of them ended up catching. Harris now has a 4.26 ERA across 6.1 innings this season and he should still continue to receive late-inning work for the time being.

Harris (groin) was activated from the 10-day injured list Thursday, Jessica Camerato of MLB.com reports.

EDGE Analysis

The right-hander should immediately slot into a high-leverage role for the Nationals. Harris appeared in only two games at the beginning of the season before straining his groin, giving up a run on three hits and two walks over 1.1 innings while striking out two.

Harris (groin) could be activated from the 10-day injured list Thursday, Jesse Dougherty of The Washington Post reports.

EDGE Analysis

Harris has been working his way back from a right groin strain that has kept him sidelined since the end of July, but he faced hitters Tuesday. He apparently felt good following the session as manager Dave Martinez suggested that he could return to the active roster Thursday. Once he returns, Harris should take on a higher-leverage role in the Nationals' bullpen.

Harris (groin) looked good after facing hitters Tuesday and is expected to return to action soon, Jesse Dougherty of The Washington Post reports.

EDGE Analysis

Harris threw 17 pitches in his session. The Nationals will make their decision about activating him after seeing how he feels Wednesday.