Jeff Samardzija. (Jacob C. Palmer/S.F. Examiner)

Jeff Samardzija labors to little effect, Giants drop another to Nats

AT&T PARK — Jeff Samardzija knocked out the San Francisco Giants’ backup first baseman on Monday. On Tuesday, he couldn’t get the Washington Nationals out.

Samardzija became the fourth pitcher in franchise history to throw 100 pitches without walking anyone to last just four innings.

San Francisco lost, 6-3.

The righty allowed back-to-back hits in the first to put the Giants in an early hole. Then in the second, Samardzija allowed an RBI single to Nats starter Gio Gonzalez to give Washington a 3-0 advantage.

Brian Morris didn’t fare much better in relief in the top of the fifth when the Nationals added three more.

Suspensions

Major League Baseball doled out punishments for the Memorial Day melee on Tuesday: Giants reliever Hunter Strickland was suspended six games while Bryce Harper got a four-game sentence.

For their part, the Nats pinned the ordeal on Strickland alone.

“I could tell the way Buster Posey reacted he had nothing to do with it,” Washington manager Dusty Baker said. “In our mind, it was not a team act but a selfish act on his part. It’s more selfish because he probably won’t ever get to come to the plate for there to be any retaliation.”

Harper will appeal the suspension, so he was in the lineup.

Injury updates

Madison Bumgarner threw on Tuesday for the first time since his infamous dirt biking accident in April.

The lefty threw from flat ground 45 times, varying the distance between 45- and 60-feet.

Bumgarner ramping up his activity is ahead of schedule as he wasn’t supposed to start his throwing program until Thursday, but was feeling good enough to speed that process up, according to Bochy.

— It was a day of firsts for the injured Giants stars as Hunter Pence ran the bases for the first time since injuring his hamstring.

Bochy said the right fielder could start a rehab stint in the minors as soon as today with a start later in the week being more probable.

Roster moves

Mac Williamson was the recipient of several pregame hugs in the clubhouse. With Orlando Calixte penciled into the leadoff spot for the game, it became clear the Giants had optioned Williamson back to Triple A Sacramento.

About a half hour later, the team made the move official.

“We could use a shot in the arm and [Calixte] was our best player down there,” Bochy said.

The Giants manager also said Williamson needed more playing time and with Pence nearing a return, that wasn’t going to be available at the big-league level.

— Closer to gametime, the club made another move by placing Michael Morse on the seven-day concussion disabled list. Kelby Tomlinson was recalled in the corresponding move.

Morse took a significant blow from Samardzija in the Giants’ rumble with the Nationals on Monday.

“I’m kind of thankful that Mikey Mo and Samardzija collided because Samardzija saw blood a little bit, I thought,” Harper said about his former teammate before Tuesday’s game. “Very thankful for Mikey Mo.”

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