UPDATE: 9:24 PM: Here's a link to a video of Stephen Strasburg grimacing on the mound during tonight's game. Still no update, Nationals never make announcements during game, will have to wait for Matt Williams post game for any new info.
[ed. note - "There is no word on what was bothering Stephen Strasburg in tonight's start, but he left the game after just three innings and 64 pitches. This is what we saw from home watching on MLB.tv. He was clearly uncomfortable on the mound. MASN's cameras caught him grimacing after at least two pitches."]
He was visited on the mound by his catcher, Wilson Ramos, and teammates early in the outing and later by Nationals' skipper Matt Williams and trainer Lee Kuntz and though he stayed in after that visit, he left the game after just three innings vs the Miami Marlins. More info when it's available.
Here's what happened in the game from out post game report which will be up after the game:
In the first inning of his second start against the Marlins in three outings, Stephen Strasburg gave up a well-struck, two-out line drive single to left on a 96 mph 1-0 fastball to Giancarlo Stanton, (who improved to 13 for 31 career vs Strasburg) and a walk to Marcell Ozuna when he missed with a 3-1 fastball on the low outside corner, but first baseman Justin Bour stepped in next with two on and two out and grounded weakly to second to end a 21-pitch frame.
Michael Taylor waited for a ricochet off the section of stands that shoot out into foul territory in left on a hard-hit grounder by third off J.T. Realmuto's bat, but it never did hit the wall, so the Marlins' catcher made it to third with a leadoff "triple" while Taylor recovered it from the corner.
[ed. note - "MASN's cameras caught Strasburg grimacing after delivering one pitch in the first."]
Ichiro Suzuki fell behind 0-2, but sent a 1-2 curve through the left side for an RBI single and a 1-0 lead. Strasburg hit Adeiny Hechavarria with a two-strike fastball to put two on in front of Mat Latos, and threw a one-hopper to first on the sac bunt by the opposing pitcher that Dan Uggla couldn't handle. Ichiro scored from third on the E:1, and the Marlins took a 2-0 lead. Dee Gordon sent a weak fly to center for the first out of the frame. Martin Prado sent a fly to left for out no.2. Giancarlo Stanton came up with two on and two out and popped out on a 96 mph 1-2 fastball. 27-pitch frame, 48 total after two.
[ed. note - "Matt Williams and Nats' trainer Lee Kuntz visited Strasburg on the mound in the second when he was grimacing and looked uncomfortable again."]
Marcell Ozuna took a 95 mph 2-2 fastball for a called strike three. Justin Bour walked on four pitches in the next at bat. J.T. Realmuto lined out to right on an 0-1 heater. Dan Uggla dove for a grounder to second by Ichiro, but didn't get it. Adeiny Hechavarria came up with two on and two out and sent a fly to left-center that Michael Taylor tracked down. 16-pitch frame, 64 total after three.
Doug Fister pinch hit for Strasburg in the bottom of the third...
• Strasburg's line: 3.0 IP, 3.0 IP, 4 H, 2 R, 2 ER, 2 BB, 2 Ks, 64 P, 37 S, 3/2 GO/FO.