Orioles manager Buck Showalter continued to express frustration Sunday about the nuances of baseball's video-replay system a day after he wasn't allowed to challenge a pivotal call in the sixth inning of a 6-2 loss to the San Francisco Giants.After center fielder Adam Jones' bunt attempt on the first pitch of the inning Saturday, the ball hit his hand, then his right leg, and bounced in front of the mound. Pitcher Madison Bumgarner fielded the ball and threw to first, where Jones was called out.Showalter asked crew chief Jeff Kellogg for a review, which would have shown that the ball hit Jones in the batter's box, which would have made it a dead ball. But Showalter was told after the umpires consulted with replay officials in New York that because home plate umpire Brian O'Nora ruled that Jones had made an attempt for the pitch and it was a live ball, it could not be reviewed."Once they rule that he attempted at it, they can't review anything else to get the play right," Showalter said. "To get the play right, you review that. It's just frustrating. I'm hoping that as we go forward, we have more things that we can correct that are wrong."It's the third time during the Orioles' road trip that a replay-related play has factored into a game. In the Aug. 7 loss to the Chicago White Sox, a ball hit down the left-field line, initially ruled foul, was reversed to a fair ball on replay, leading to the go-ahead run.The previous night at U.S. Cellular Field, the Orioles benefited from replay in a win in Chicago when a call deeming Dioner Navarro out at third was upheld after video review, taking away a runner in scoring position in a two-run game.But Showalter was flummoxed by the fact that Saturday's play never got to review."Those guys are out there to umpire, and the people in New York are there to correct things," Showalter said. "They went there, and we're trying to get the play right if it's something correctable, and they got told it wasn't reviewable once Brian had ruled that he had attempted. But it's still a foul ball if he attempted. There's a lot of things like that, and it seems to have happened a lot to us this year. Maybe I'm paranoid, or maybe I'm alert. There's a fine line between the two."Jones back in lineup: Jones was back in the starting lineup Sunday after he was hit in the right hand by a 91-mph fastball on his sixth-inning bunt attempt.Jones, who remained in the game Saturday, was hitless in five at-bats Saturday but nonetheless entered Sunday's game hitting .400 (16-for-40) on the road trip, including six multihit games in nine contests."He's hammering balls off his feet and he's back to hitting around .280," Showalter said. "He's going to have another Adam Jones year: play the heck out of center field and post up. There are guys who play 90 games in center field and play at a Gold Glove level. Adam plays a lot more games than they do and plays at a high level, so I give him some benefit for that. I think it's a good example. He's a tough guy."Since missing four games with a rib cage injury in the first two weeks of the season, Jones started in his 108th straight game Sunday and has played in every game since April 14."That's the part about Adam that people [don't understand]," Showalter said. "There's a term I've heard — and I don't want to jinx him — they talk about bad and good tissue," Showalter said. "He's a good healer. He's not a guy that gets involved in eyewash of trying to let everybody feel every ounce of discomfort. I think the word you never use to describe him is 'eyewash' or 'false hustle.' Adam posts up. I know what we have in him, and it's an honor to watch him post up every day."A look to September: Several players are expected to return from the disabled list around Sept. 1, when rosters expand, but Showalter said he doesn't expect to add many players beyond them.Showalter said he's talked about potential call-ups with his coaching staff but still has to discuss moves with executive vice president Dan Duquette."I don't want 40 guys up here," Showalter said. "I want guys up here that can help us. … We'll sit down and bang it around again. Things will change the next couple of weeks. In our situation, it's not going to be a tryout camp. It's going to be, 'Come up here and help us.' I know Dan feels that way."Relievers Darren O'Day (right rotator cuff strain), T.J. McFarland (knee injury) and Brian Duensing (left shoulder inflammation) and outfielder Joey Rickard (thumb ligament sprain) all are expected to return around Sept. 1."Some before that, I hope," Showalter said.One player under consideration for a call-up would be Christian Walker, whose offensive numbers at Triple-A Norfolk — .258/.322/.408 with 12 homers and 49 RBIs in 108 games — are similar to those from last season, while also making the transition from first base to left field."He's played OK out there," Showalter said. "He's gotten better as the season's went on. I was just reading the narratives about him this morning. He hasn't had the year he hoped he would have. He's done some good things out there. New position, he's done OK out there. He's not going to be Adam Jones, but who is?"eencina@baltsun.comtwitter.com/EddieInTheYard