Miller has been diagnosed with a rotator cuff strain and is expected to be placed on the 10-day injured list, Brittany Ghiroli of The Athletic reports.

EDGE Analysis

Miller left Friday night's outing in pain, and he'll likely hit the shelf for the second time this season. The Nationals figure to call up a fresh arm once the move becomes official.

Miller was lifted from Friday's game against the Cubs due to an apparent injury, Byron Kerr of MASN Sports reports.

EDGE Analysis

After issuing a four-pitch walk to Javy Baez, Miller went to the back of the mound and crouched down in pain. He would eventually exit the ballgame with the team trainer. Miller has already spent time on the injured list with a back injury earlier this season, though it's unclear if he's dealing with a similar issue.

Miller struck out one in a perfect sixth inning Thursday to record his fourth hold of the season in a win over the Mets.

EDGE Analysis

The right-hander has been stingy since returning to the mound from a back injury, reeling off eight straight scoreless appearances to lower his ERA to 3.00 on the year. Miller's 4:1 K:BB over that stretch is far from dominant, but in a Nats bullpen where little has gone right, he should continue to see setup work as he looks to match or beat last season's career-high 11 holds.

Miller (back) was activated off the 10-day injured list Friday, Dan Kolko of MASN Sports reports.

EDGE Analysis

Miller made one appearance with High-A Potomac on Wednesday and won't require any further rehab outing as he returns from the back strain. The 31-year-old allowed four runs -- all solo homers -- on nine hits over 6.1 innings prior to suffering the injury.

Miller (back) will begin a minor-league rehab assignment Wednesday with High-A Potomac, Byron Kerr of MASN Sports reports.

EDGE Analysis

Miller has been on the shelf for a little less than two weeks with a lower-back strain, so he shouldn't need too many minor-league appearances before being cleared to rejoin the big-league bullpen. Prior to landing on the IL, Miller compiled a 5.68 ERA, 1.74 WHIP and 6:2 K:BB in 6.1 innings.

Miller (back) was spotted playing catch in the outfield Thursday, Jesse Dougherty of The Washington Post reports.

EDGE Analysis

Miller was placed on the 10-day injured list last week with a lower-back strain, but his ability to resume a throwing program implies that he's made some progress. He could take another step forward over the weekend by completing a bullpen session, which would likely put him on track to return from the IL in the minimum amount of time or close to it.

Miller suffered a back strain during Friday's game against the Pirates and will require a trip to the 10-day injured list, Byron Kerr of MASN Sports reports. He allowed one run on one hit and a walk over one inning.

EDGE Analysis

Miller managed to finish the frame, but he revealed after the ballgame that he'll spend at least the next 10 days on the injured list. It's unclear at this time if he'll be ready to return to action after the minimum.

Miller struck out two in a perfect sixth inning to record his first hold of the season during Sunday's win over the Mets.

EDGE Analysis

He was the only member of the Nats' bullpen to do his job effectively in this one -- the club needed a Trea Turner walkoff shot to salvage the victory. Miller is stuck in middle relief right now, which will limit his opportunities for holds, but if the arms above him continue to struggle, the right-hander could work his way into a higher-leverage role fairly quickly.

Miller (back) surrendered a double but retired the other three hitters he faced as part of a scoreless fifth inning in Sunday's 6-4 Grapefruit League win over the Astros.

EDGE Analysis

Miller returned to the Washington bullpen after a lower-back injury had kept him out of action for the previous eight days. The 31-year-old made quick work of the first two hitters he faced and was probably deserving of a perfect inning since the double he yielded to Jake Marisnick was largely a result of center fielder Victor Robles losing the flyball in the sun. Manager Dave Martinez has already confirmed that Miller has a spot in the Nationals' Opening Day bullpen, so the right-hander's main focus will just be staying healthy over the next couple of weeks.

Miller (back) will throw one inning out of the bullpen during Sunday's spring game against the Astros, Mark Zuckerman of MASN Sports reports.

EDGE Analysis

Miller has been dealing with a lower-back strain throughout spring training but received a a Toradol shot last week and had a successful bullpen session Friday. Assuming the return to game action doesn't cause his back to flare up, the veteran right-hander appears to be on track for Opening Day.